Is a red spot under my toenail something to worry about?

Reviewed by Yoshinori Abe, MD

Internal Medicine

A red spot under your toenail is often caused by a subungual hematoma, a small bleed beneath the nail from injury or pressure. Other possible causes include fungal infection, a blood blister, or, in rare cases, melanoma. If the spot is painful, growing, changing color, or appeared without injury, it's important to see a doctor promptly.

Because red spots under the toenail can range from harmless bruises to conditions that need medical attention, understanding your specific symptoms is key to knowing what to do next. A free, instant, online symptom check can help you identify possible causes based on your unique situation and guide you toward the right next steps—saving you time, worry, and unnecessary uncertainty.

Reviewed for medical accuracy: 07/15/2026

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Explanation

A red spot under the toenail may seem concerning, but it can have different causes. One common reason is a subungual hemorrhage, which is a small bleed under the nail. This can happen from minor trauma, like stubbing your toe, and often resolves on its own. However, persistent or multiple red spots might need further examination.

Possible Causes:

Subungual Hemorrhage: This is often due to trauma and can appear as a red or dark spot under the nail.
Nail Changes in Diseases: Sometimes, diseases affecting connective tissues can cause changes in nails, including red spots.
Other Conditions: Rarely, red spots can indicate more serious underlying conditions.

If the red spot does not go away, changes, or is accompanied by other symptoms, you can use Ubie's free AI-powered symptom checker to help identify potential causes and determine whether you should consult a healthcare provider for further investigation or treatment.

(References)

Chang C, Beutler BD, & Cohen PR. (2017). Report of a Patient with Multiple Horizontal Red Bands .... Dermatology and therapy, 28260214.
Iglesias P, Olmos O, Sastre J, Diez JJ, Fernandez ML, & Borbujo J. (1996). Subungual hemorrhages. A primary manifestation of .... Archives of family medicine, 8620258.
Elmansour I, Chiheb S, & Benchikhi H. (2014). Nail changes in connective tissue diseases: a study of 39 .... The Pan African medical journal, 25419288.

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