What is Subungual Melanoma?
It is a type of melanoma in the nails. Unlike other types of nail melanoma that grow in the surrounding skin, this type begins in the nail matrix. Sometimes melanoma looks like other conditions that affect the nail bed, such as a bruise. It is a rare condition yet early detection is a must. Symptoms include bleeding at the site of pigmentation, a dark band or pigmentation on the nail that slowly expands and start to cover the entire nail.
Cause
It can be due to injury or trauma.
Management
Please consult a doctor for further diagnosis.