When ongoing pain might need more than rest and physio

“My pain has been there for weeks, I’m doing the right things, but it’s still there — do I need a scan or a specialist now?” In many everyday heel, shoulder, ankle and groin problems, the safest first step is still a clear history, a hands-on examination and a structured rehab plan, rather than jumping straight to an MRI.

A scan is not automatically “the next best step” because many common problems improve over several weeks with simple measures and physiotherapy, and imaging can also show incidental age- or load-related changes that are not the main driver of pain. For example, NHS guidance for plantar fasciitis (a typical cause of morning “first-step” heel pain) starts with self-care and suggests review if symptoms are severe, worsening, or not improving after about 2 weeks, or if there is tingling/loss of feeling or diabetes. The same selective approach runs through evidence-based frameworks, which describe imaging as something used to confirm a suspected diagnosis and rule out alternatives when the picture is unclear or not settling.

A practical decision rule is:

• Reasonable to stay the course when symptoms are improving (even slowly) and function is returning week by week.
• Book a routine MSK assessment when pain is stopping normal activities, affecting sleep, worsening, or persisting beyond roughly 2 weeks despite sensible care (NHS uses this threshold for both heel and hip pain advice). Imaging is then considered selectively—based on the pattern of symptoms and examination findings—rather than as routine screening.
• Seek urgent care the same day after significant injury if there is inability to walk or weight-bear, or if a joint becomes hot and swollen with fever/systemic illness; NHS hip pain guidance also flags new tingling or loss of feeling after trauma as an emergency feature.

The rest of this guide stays on the routine pathway—after the urgent red flags above—using four common patterns that often prompt the “do I need a scan?” question: persistent morning heel pain (plantar fasciitis-type), rotator cuff–type shoulder pain, an ankle that keeps “giving way” after a “simple” sprain, and deep groin pain in active adults (where labral/FAI problems can mimic a strain).

For people in Lincolnshire, consultant assessment and imaging can be arranged without a referral at MSK Doctors in Sleaford (NG34) and Grantham (NG31); the aim is to use examination first and reserve X-rays/ultrasound/MRI for cases where the symptom pattern, severity, or lack of progress makes imaging genuinely useful.

Ongoing morning heel pain and plantar fasciitis

First-step heel pain has a fairly consistent pattern, and the NHS description is a good match for what clinicians call plantar fasciitis: pain on the bottom of the foot around the heel and arch that is worst with the first steps after sleep or rest, eases as movement warms things up, and then often returns after long periods of standing, walking or running. This pattern is common after a recent change in load — for example, more walking, running, or long shifts on hard floors — and many cases are diagnosed clinically without a scan.

For the first couple of weeks, NHS advice focuses on simple, practical measures rather than imaging: relative rest from impact, ice, calf and plantar fascia stretching, cushioned/supportive footwear or insoles, low‑impact exercise, and simple pain relief (as advised by a pharmacist). The key is consistency over days rather than a single “magic” stretch session.

The threshold for assessment is lower when the presentation is more severe or less typical. NHS guidance advises GP review if heel pain is severe or stopping normal activities, is getting worse or keeps coming back, or has not improved after about 2 weeks of self‑care; it also flags earlier review when there is tingling, loss of feeling, or diabetes.

A scan is usually reserved for cases where the story or examination suggests something other than straightforward plantar fasciitis, or when progress is slow despite well‑done conservative care. Evidence‑based frameworks describe imaging as selective (rather than routine), used to confirm plantar fascia pathology and help rule out alternatives such as tarsal tunnel syndrome or a calcaneal stress fracture. In plantar fascia disorders, ultrasound is commonly described as the first‑line test and MRI as second‑line; exact measurement thresholds (for example, a plantar fascia thickness around 4 mm on MRI) are mainly used by clinicians and rarely change early self‑care.

Features that are less typical of “simple” plantar fasciitis — and which generally lower the threshold for specialist review and/or imaging — include:

• constant pain at rest or night pain (rather than mainly “first‑step” pain)
• pain that feels higher up in the heel or into the calf, rather than under the heel/arch
• significant swelling, marked bruising, or a clear history of a fall/impact
• nerve‑type symptoms such as tingling or numbness, colour change, or symptoms affecting both feet
• systemic symptoms such as fever or unexplained weight loss

Where imaging is needed, the useful next step is often pairing it with an objective assessment of loading and mechanics (for example, walking and calf function), because plantar heel pain can persist when the tissue irritability has settled but the load pattern has not.

Rotator cuff shoulder pain that lingers

A lingering, “grumbly” shoulder that came on without a single big injury is often managed very differently from a shoulder that becomes suddenly weak after a clear event (for example, a fall or lifting a heavy bag). In day-to-day clinics, a large share of shoulder pain is rotator cuff–related, and the initial goal is usually to settle irritability and rebuild capacity rather than to “hunt for a tear” on day one. [trafilatura:https%3A%2F%2Fchiroup.com%2Fblog%2Frotator-cuff-tears-when-to-mri-when-to-refer]

In the slower-onset pattern, pain is commonly felt over the upper/outer arm (often described as the “deltoid area”), and it is typically worse with overhead work (putting something in a cupboard), reaching behind the back (fastening a bra), or lying on the affected side at night. A key clinical clue is that passive movement—when someone else lifts and rotates the arm—tends to be roughly preserved, even if active movement is painful and feels weak. [trafilatura:https%3A%2F%2Fchiroup.com%2Fblog%2Frotator-cuff-tears-when-to-mri-when-to-refer]

When the onset is atraumatic and there is only mild, pain-limited weakness, many people improve over several weeks with load modification (temporary reduction in painful overhead work) and a well-structured physiotherapy programme that rebuilds rotator cuff and shoulder blade control. In that common scenario, an immediate MRI is not routinely the first step—especially if week-by-week function is returning, even slowly. [trafilatura:https%3A%2F%2Fchiroup.com%2Fblog%2Frotator-cuff-tears-when-to-mri-when-to-refer, google_serp:organic:https%3A%2F%2Finfo.shields.com%2Fbid%2F92978%2FMRI-Rotator-Cuff-Injuries-when-you-need-one-when-you-don-t]

A scan can add clarity, but it is not itself a treatment. Shoulder MRI reports often use terms like “tendinopathy” or “degenerative change”, and those findings still need to match the real-world pattern—what hurts, what is weak, and what movements are actually limited—before they change the plan. That is one reason clinicians place more weight on objective weakness on examination than on how painful a particular test feels on a bad day. [google_serp:organic:https%3A%2F%2Finfo.shields.com%2Fbid%2F92978%2FMRI-Rotator-Cuff-Injuries-when-you-need-one-when-you-don-t]

Earlier consultant assessment and likely imaging becomes more relevant in a “sudden, weak” shoulder—particularly when passive movement remains good but power drops off. Examples include an injury followed by inability to lift the arm to wash hair, struggling to pour from a kettle with the affected arm, repeatedly “dropping” light objects, or a clear strength difference compared with the other side. Pain plus weakness with relatively preserved passive range of motion is repeatedly cited as a pattern where a significant rotator cuff tear needs to be considered, and prompt imaging may be used to guide next steps. [google_serp:organic:https%3A%2F%2Finfo.shields.com%2Fbid%2F92978%2FMRI-Rotator-Cuff-Injuries-when-you-need-one-when-you-don-t, google_serp:organic:https%3A%2F%2Fwww.totalorthosportsmed.com%2Fimaging-for-a-full-rotator-cuff-tear%2F]

Time and impact matter too, but the cut-off is not a hard deadline. In common referral pathways, clinicians often consider ultrasound or MRI when shoulder pain has persisted for around 6 weeks despite appropriate rest, home measures and structured rehab—especially if pain is disturbing sleep despite positioning/medication, or if symptoms are significantly limiting work or sport. This is usually interpreted alongside the onset story (traumatic vs gradual), strength testing, and whether stiffness is the dominant issue. [google_serp:organic:https%3A%2F%2Famericanhealthimaging.com%2Fwhen-to-get-an-mri-for-shoulder-pain%2F]

Where imaging is likely to change management—for example, after a traumatic episode with sudden weakness—our consultants can usually coordinate same-day assessment and imaging in Sleaford (NG34) or Grantham (NG31). Even then, the practical decision is typically based on a combination of factors (onset, strength, passive range, night pain and functional loss), rather than any single test result or a fixed week-count. [google_serp:organic:https%3A%2F%2Famericanhealthimaging.com%2Fwhen-to-get-an-mri-for-shoulder-pain%2F, google_serp:organic:https%3A%2F%2Finfo.shields.com%2Fbid%2F92978%2FMRI-Rotator-Cuff-Injuries-when-you-need-one-when-you-don-t]

An ankle that keeps giving way after a sprain

A rolled ankle can feel dramatic on day 1, yet many “simple” lateral ankle sprains settle over the following weeks with sensible protection, gradual return to walking, and progressive balance work—without any need for MRI. The challenge is working out when an ankle is simply still regaining capacity, versus when there is ongoing instability or a hidden joint/tendon problem keeping symptoms going.

Is it just weak and deconditioned — or is there something more mechanical?

An ankle that is mainly “deconditioned” after a sprain often shows a steady trend: swelling reduces week by week, walking tolerance improves, and confidence returns with balance and calf-strength work. In contrast, longer-term patterns can suggest chronic ankle instability (CAI) or associated injuries. An updated model describes CAI as affecting up to 40% of people after a first-time lateral sprain, with problems persisting beyond about 12 months such as recurrent sprains, frequent episodes or perceptions of the ankle “giving way”, and ongoing pain, swelling, limited motion or weakness.

When a recent sprain does (and doesn’t) need imaging

In typical acute sprains, expert guidance notes that MRI is not routinely indicated and is usually reserved for unusual presentations—particularly extensive swelling, ecchymosis (bruising), or pain out of proportion—because these features raise suspicion for osteochondral lesions or other associated injury rather than a straightforward ligament sprain. Early plain X‑rays are commonly used when fracture is a concern (for example, after a higher-energy twist/fall or when weight-bearing is not possible), with advanced imaging held back for cases that do not fit the expected pattern or trajectory.

Acute features that generally lower the threshold for urgent assessment and/or early imaging include:

• very extensive bruising or swelling (ecchymosis) compared with a “typical” sprain
• pain that seems disproportionate to the mechanism, raising concern for an associated injury
• inability to weight-bear immediately after injury (often framed clinically as inability to take four steps)

Months later: the “rolled it ages ago, still don’t trust it” ankle

When symptoms persist for months rather than weeks, the more useful question becomes whether the ankle is repeatedly unstable or mechanically symptomatic:

• recurrent sprains or repeated episodes of “giving way”, especially on uneven ground
• swelling that repeatedly flares after activity, rather than steadily trending down
• mechanical symptoms such as catching, locking, or a sensation of something moving in the joint

Why one MRI does not always “rule everything out”

MRI can be very helpful—particularly when surgery is being considered in established CAI because multiple problems can coexist (chondral injury, tendon tears, loose bodies, impingement). Radiology references therefore describe MRI as routinely used for preoperative planning in CAI. However, a surgical series of 133 patients undergoing lateral ligament reconstruction found that preoperative MRI reports detected only 39% of chondral injuries and had an overall sensitivity of about 45% for associated lesions (rising to 63% when the surgeon reviewed the MRI themselves). This means persistent mechanical symptoms can still merit re-evaluation even when a scan has been reported as “normal”.

In practice, decisions are usually based on the combination of history (for example, repeated “giving way” episodes over 12 months), examination findings, and whether selective imaging is likely to change the plan—aiming for realistic outcomes such as fewer episodes of giving way, improved confidence on uneven ground, and return to preferred walking or sport.

Deep groin pain in active adults

A nagging worry with groin pain in sport is whether it is “just a strain” or something deeper inside the hip joint. The distinction matters because a straightforward adductor or hip‑flexor strain usually follows a fairly predictable recovery pattern, while hip joint problems can be more stubborn and may need hip‑focused imaging to clarify what is driving symptoms. [trafilatura:https%3A%2F%2Fmy.clevelandclinic.org%2Fhealth%2Fdiseases%2F17756-hip-labral-tear]

With femoroacetabular impingement (FAI) syndrome and labral tears, pain is often described as a deep ache in the front of the hip or groin, sometimes accompanied by sharper mechanical symptoms such as “clicking, catching or locking”. It is frequently provoked by positions that load hip flexion—think low sitting, driving, or squats—rather than only by one memorable sprint or overstretch. [trafilatura:https%3A%2F%2Fmy.clevelandclinic.org%2Fhealth%2Fdiseases%2F17756-hip-labral-tear; trafilatura:https%3A%2F%2Fradiologyassistant.nl%2Fmusculoskeletal%2Fhip%2Ffemoroacetabular-impingement-syndrome; google_serp:organic:https%3A%2F%2Fradiopaedia.org%2Farticles%2Ffemoroacetabular-impingement-syndrome%3Flang%3Dus]

By contrast, a more straightforward muscle injury often behaves like a tissue overload problem: pain is more superficial and localisable to the muscle belly or tendon, and it tends to improve steadily over several weeks with relative rest and a graded strengthening plan, without persistent catching/locking sensations. Because groin and hip pain can overlap, the “trajectory” (week‑to‑week improvement versus repeated flares) becomes a practical clue alongside the location of tenderness on examination. [trafilatura:https%3A%2F%2Fmy.clevelandclinic.org%2Fhealth%2Fdiseases%2F17756-hip-labral-tear]

FAI is also not a diagnosis that comes from an X‑ray finding alone. Radiology guidance describes FAI syndrome as present only when three elements come together: (1) typical symptoms (often ventral hip/groin pain), (2) positive clinical signs on examination, and (3) imaging findings of cam and/or pincer morphology that plausibly explain impingement and labral/cartilage injury. That framework is one reason clinicians often start with plain radiographs to assess shape, and use MRI (often MR arthrography) when the question is the labrum and cartilage. [trafilatura:https%3A%2F%2Fradiologyassistant.nl%2Fmusculoskeletal%2Fhip%2Ffemoroacetabular-impingement-syndrome; google_serp:organic:https%3A%2F%2Fradiopaedia.org%2Farticles%2Ffemoroacetabular-impingement-syndrome%3Flang%3Dus; trafilatura:https%3A%2F%2Fmy.clevelandclinic.org%2Fhealth%2Fdiseases%2F17756-hip-labral-tear]

The overlap with “sports hernia” (athletic pubalgia) is a common reason groin pain becomes confusing. In a surgical series of 43 athletes treated for athletic pubalgia, radiographic signs of FAI were reported in 86% (cam in 83.7%, pincer in 28%), raising the possibility that unrecognised hip impingement can contribute to ongoing groin symptoms even when the abdominal wall has been addressed. [trafilatura:https%3A%2F%2Fpmc.ncbi.nlm.nih.gov%2Farticles%2FPMC3931339%2F]

There is limited high‑quality evidence for a single “best” timepoint for hip imaging in these grey‑area cases, so practice is usually guided by pattern recognition: whether symptoms match a muscle strain and are improving, or whether they look and behave like joint pain (deep, flexion‑provoked, mechanical, persistent). NHS guidance also uses functional impact as a simple threshold—seeking assessment when hip pain affects sleep, stops normal activities, worsens, or persists beyond about 2 weeks—and flags urgent assessment for severe sudden pain, inability to walk/weight‑bear after injury, a hot swollen hip with systemic illness, or new tingling/numbness after trauma. [nhs:https%3A%2F%2Fwww.nhs.uk%2Fconditions%2Fhip-pain%2F]

• More consistent with a strain (rehab first, reassess if progress stalls): a clear sprint/overstretch event + pinpoint superficial tenderness in the adductor/hip‑flexor region + steady improvement over weeks, without catching/locking.
• More suggestive of a hip joint driver (hip-focused assessment and imaging often considered): deep groin/anterior hip pain + symptoms provoked by hip flexion (low chairs, driving, squats) + clicking/catching/locking, or symptoms persisting beyond the expected pattern for a muscle strain. [trafilatura:https%3A%2F%2Fmy.clevelandclinic.org%2Fhealth%2Fdiseases%2F17756-hip-labral-tear; trafilatura:https%3A%2F%2Fradiologyassistant.nl%2Fmusculoskeletal%2Fhip%2Ffemoroacetabular-impingement-syndrome]

What to expect from specialist assessment at MSK Doctors

A specialist appointment becomes most useful when the main question is no longer “what can I try at home this week?” but “what exactly is being overloaded, and would a scan change the plan?” To keep this practical rather than promotional, the outline below describes how specialist MSK assessment typically works, with MSK Doctors access details kept to a single line at the end.

In a first consultant-led appointment, the starting point is usually a detailed history anchored to specific triggers (for example, first-step morning heel pain, night pain in a shoulder, an ankle that keeps “giving way”, or groin pain provoked by hip flexion when driving). That history is then matched to a targeted physical examination in the clinic room—strength, range of motion, joint-specific tests, and “load-response” checks that recreate symptoms in a controlled way.

Where symptoms suggest a movement or control component—common after a lateral ankle sprain—assessment often includes functional tests such as single-leg balance, hopping control, and gait observation. This reflects modern thinking about chronic ankle instability, where persistent symptoms can involve more than ligaments alone and may include sensory-perceptual and motor-behavioural factors alongside mechanical issues. In Sleaford (NG34) and Grantham (NG31), this can be supported by optional movement analysis (including MAI Motion® in suitable cases) to help identify biomechanical contributors that may keep the foot, ankle, hip or shoulder overloaded. [ai4scholar:e77722bbbd9c7d2951b31d99910baf260029e836]

Imaging is then used as a tool—ordered when it is likely to clarify the diagnosis, rule out an important alternative, or change treatment decisions—rather than as an automatic next step for every persistent pain problem. A typical sequence, chosen to match the clinical question, is:

• Plain X-rays: to look at alignment, joint space and bony features when that is relevant to symptoms.
• Ultrasound: when a superficial tendon/soft-tissue structure is the likely pain generator and a dynamic assessment is helpful.
• MRI: when deeper structures (for example, labrum, cartilage or more complex tendon problems) are suspected or when prior management has not matched the clinical picture; an Open MRI option is available in Sleaford (NG34) for people who struggle with conventional enclosed scanners. The emphasis in evidence-based frameworks is on selective imaging to confirm suspected pathology and check for alternative diagnoses, not routine scanning of every case. [ai4scholar:82f9f11828ef7b1905c63336c7e1d7f8bbe4904d]

Across heel, shoulder, ankle and groin presentations, the management plan commonly follows the same four-stage logic: (1) tighten the diagnosis (history + examination ± selective imaging), (2) optimise conservative care (education, load management, physiotherapy-led rehabilitation), (3) consider adjuncts when appropriate (for example, bracing or injection options in selected cases), and (4) consider surgery only when symptoms remain significantly limiting after non-operative care has been properly worked through. Where scans are obtained, tools such as onMRI™ may support interpretation, but decisions still rest on a consultant relating imaging findings back to symptoms and examination findings, rather than treating a report in isolation.

Appointments at MSK Doctors can be booked online without referral at mskdoctors.com.

1. [1] An Updated Model of Chronic Ankle Instability.. (2019). https://doi.org/10.4085/1062-6050-344-18 https://doi.org/10.4085/1062-6050-344-18