What Does a Dark Spot Under the Fingernail That Is Not a Bruise Indicate?
1. Introduction A dark spot under the fingernail that is not a bruise or hematoma primarily indicates a potential subungual melanoma, a rare but highly dangerous form of skin cancer. It can also point to benign conditions such as a melanocytic nevus, a fungal infection, or drug-induced hyperpigmentation. When trauma has been definitively ruled out, … Read more