Dupuytren Subungual Exostosis: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Dupuytren Subungual Exostosis?
A primary care doctor is a good first stop. They can examine the toe, order an X-ray, and start simple treatments. If surgery is needed, they will usually refer the patient to a podiatrist or an orthopedic surgeon. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Dupuytren subungual exostosis is a small, noncancerous growth of bone and cartilage. It forms under or beside a toenail, most often on the big toe. The growth pushes up on the nail from underneath, causing pain and changes in how the nail looks. It is not an infection, and it does not spread to other parts of the body.
Symptoms
The most common symptom is pain in the toe, often worse with shoes or pressure. The nail may look lifted, thickened, or curved, and a hard bump may be felt under the nail edge. Because the nail can look damaged, people sometimes mistake the growth for a wart or fungal infection.
Causes and who gets it
Doctors do not fully understand why these growths form, but repeated toe injury may play a role. It is most often seen in children, teenagers, and young adults, and appears more often in females. Despite the name, it is not related to Dupuytren contracture, a hand condition; the shared name comes from history, not a shared cause.
How doctors diagnose it
A doctor will examine the toe and ask about symptoms and past injuries. An X-ray is the main test and shows the extra bone under the nail, confirming the diagnosis. Other tests, such as a nail scraping, help rule out fungus or a wart.
Treatment
If pain is mild, wider shoes, padding, or toe covers may be enough. When pain continues or the nail is badly affected, doctors usually recommend surgery to remove the growth, typically done with numbing medicine. The growth can come back in some people. Recovery involves keeping the toe clean and protected while the nail grows back, which can take several months.
When to see a doctor
See a doctor if a toe hurts for more than a week or two, or if a nail looks lifted, thickened, or deformed without a clear reason. Get care sooner if the skin around the nail becomes red, warm, swollen, or drains pus, which can mean infection. Anyone with diabetes should have foot problems checked promptly.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance and can often manage this problem from start to finish, including arranging surgery with a specialist. A concierge doctor usually charges more and often works alongside insurance but offers similar access. Either type would refer the patient to a podiatrist or orthopedic surgeon if needed and help coordinate follow-up care.
Common questions
Is Dupuytren subungual exostosis cancer?
No. It is a benign growth, which means it is not cancer and does not spread. Doctors may still examine the removed tissue to confirm the diagnosis.
Can it go away on its own?
These growths usually do not disappear without treatment. Some people manage fine with wider shoes and padding, while others need surgery for lasting relief.
Will the nail look normal after surgery?
Often the nail improves once the growth is removed, but it may grow back thick or ridged in some people. Nail regrowth takes several months, and results vary from person to person.
Sources
- MedlinePlus - Nail Diseases
1. MedlinePlus - Nail Diseases (https://medlineplus.gov/naildiseases.html)
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
