Metatarsalgia: when a foot X-ray finds a variation, not a villain.

Your second metatarsal may be shorter than average. So are millions of pain-free feet. Here is how to think about it.

This page is about understanding the condition and the role the brain and nervous system can play in it. It is not a diagnosis. Your own clinicians know your case.

What metatarsalgia due to a short second metatarsal is

The metatarsals are the five long bones that run from the midfoot to the toes. Their heads form the ball of the foot and take a large share of your weight when you push off. Metatarsalgia is the general term for pain in that area: aching, burning or sharp pain under the ball of the foot, often worse barefoot, in thin shoes, or after standing and walking.

When someone with this pain has an X-ray, the second metatarsal sometimes turns out to be shorter than the first, or the first longer than the second, so the weight distribution across the forefoot looks uneven. The reasoning is that the neighbouring bones then take more load and become sore. It is a plausible mechanism, and the usual treatment, a metatarsal pad or orthotic to spread load, sensible shoes, calf stretching and a period of reduced impact, often helps.

The neuroplastic contribution

The ATNS Index of Neuroplastic Symptoms says that neuroplastic symptoms can contribute to pain in this part of the foot, and that an evaluation for them should be done, particularly when the symptoms or their course over time are not typical, or the response to treatment is not what was expected. It does not say the bone variant never matters; it says the variant is not a sufficient explanation on its own, and that the nervous system should be checked rather than assumed innocent.

Neuroplastic symptoms are real physical symptoms produced by learned patterns in the brain and nervous system, a protective alarm that has become sensitized, rather than by ongoing injury or a mechanical fault. They are not imaginary and not a character flaw. Feet are a frequent site because every step gives the brain a chance to check for danger; once an X-ray report has told it that the foot is built wrong, it has a reason to keep guarding. Our explainer on central sensitization describes how this happens.

Features that raise the likelihood of a neuroplastic contribution:

• The pain began without a change in load, footwear or activity.
• It persists despite pads, orthotics and rest, or returns as soon as they are removed.
• It spreads to the other foot, which has the same anatomy and was previously fine, or to the ankle and knee.

What the research shows

A 2025 educational review of the radiological approach to metatarsalgia notes that forefoot pain commonly results from static foot disorders, that weight-bearing X-rays are needed to assess them, and that the list of possible causes is long (toe deformities, bursitis, Morton's neuroma, plantar plate injury, stress fracture). Its central message is that imaging findings must be combined with the clinical picture; a picture alone does not diagnose the source of pain. That is the same caution the ATNS index raises about short second metatarsals.

Studies that measured metatarsal length directly back this up. A comparison of people with metatarsalgia and pain-free feet found that relative metatarsal length had no influence on plantar pressure or force, and the authors concluded there is no evidence that metatarsal length alone predisposes to primary metatarsalgia. A study of older adults found that those with current or past forefoot pain had higher pressure under the outer metatarsal heads, but their lesser metatarsals were not relatively longer.

The picture is not one-sided. After bunion (hallux valgus) surgery, a study found that relative second metatarsal length was the only significant predictor of new pain under the neighbouring metatarsals, so length can matter once the forefoot has been surgically changed.

No study has looked at central sensitization or a neuroplastic approach in this condition, so the evidence for a brain contribution is indirect. What the research does show is that, outside surgery, metatarsal length is a poor predictor of who hurts.

Signs the brain may be part of the picture

• Your other foot has the same short metatarsal and no pain, or has started hurting without injury.
• Pads, orthotics and new shoes help briefly or not at all.
• The pain is burning, tingling or sensitive to light touch.
• It has lasted many months without a clear structural progression.

A solution that addresses it

When the brain is contributing, the approach that addresses it is pain and symptom reprocessing: education about neuroplastic pain so the foot stops feeling structurally doomed, somatic tracking (noticing the sensation with curiosity rather than fear), reducing threat and guarding, a graded return to walking in ordinary shoes, emotional awareness and expression, and acceptance and commitment skills. Trained clinicians deliver this, and it is increasingly available through digital programmes.

Cindra is a daily AI companion built around these approaches, with daily check-ins, short practices and plain-language lessons for people whose symptoms have a neuroplastic component. If your forefoot pain has outlasted every pad and insole, you can join the waitlist.

What to do next

Get the foot properly assessed. A podiatrist or orthopaedic foot specialist should check for a stress fracture, plantar plate tear, Morton's neuroma, capsulitis, arthritis and bursitis, and treat what they find. Sudden severe pain after impact, a hot swollen forefoot, numbness, or a toe that is drifting out of position need prompt attention.

Then ask the honest question. Would a short second metatarsal cause this much pain, for this long, in someone whose other foot is identical and fine? If the answer is doubtful, ask whether a neuroplastic pattern fits.

Then start retraining. Read why hurt is not harm, use pacing to rebuild walking, and see the related entries for toe capsulitis, Morton's neuroma and flat feet pain in the condition index.

This article is for general education and is not medical advice, and it does not diagnose or treat any condition. Persistent symptoms deserve a proper medical assessment to rule out disease or injury before a neuroplastic explanation is considered. If your symptoms are new, changing, or come with red-flag signs such as fever, unexplained weight loss, numbness or weakness, chest pain, or loss of bladder or bowel control, see a clinician promptly.