If there is a visible black mass on the scalp, it is necessary to carefully observe the appearance of the black mass. If there is significant hair loss above the mass, accompanied by intense itching, and there are no obvious bumps when touched with the hand, but roughness can be felt, it is considered that it may be tinea nigra resulting from fungal infection. This disease is somewhat contagious, and for treatment it is recommended to choose oral terbinafine tablets and then apply clotrimazole cream locally, and continuous treatment for a period of time will result in effective relief of the black patches. If the black plaque is not painful or itchy and is mainly raised in folds, it may be a pigmented nevus on the scalp. In this case, you need to choose surgery to remove it and then do pathological testing. If malignant changes occur or if the removal is not clean, a second surgery is needed to expand the removal.