Subungual melanoma

Subungual melanoma is a rare but serious type of skin cancer that develops under the fingernails or toenails, often appearing as a dark streak or pigmentation. It can be mistaken for bruises or other nail conditions but tends to persist or worsen over time. This cancer arises from pigment-producing cells called melanocytes. Early detection and treatment are crucial to prevent the spread to other parts of the body. If you notice a new or changing dark streak under a nail, especially if it doesn’t heal or grow, consult a healthcare professional promptly.