Nails blackened in half may be due to trauma, onychomatous nevus, gray nails and other factors.
1. Trauma: This is a common cause, patients may be hit by heavy objects, excessive pressure and other reasons, resulting in bleeding under the nails, manifested as blackened nails.
2. Mole of the nail: patients with half black nails need to be highly suspected of being related to the mole of the nail. Mole belongs to one kind of nevus, the common symptom is black nail line, but there is a small chance that it will change into melanoma.
3. Gray nail: usually refers to onychomycosis, when the patient’s dermatophytes invade the nail bed of the nail plate, it will cause the nail plate to appear black half of the situation, and there may also be cloudy nail plate, thickening, brittle, discoloration, and shedding and other phenomena.
Nails black half may also have other reasons, need to actively consult the doctor, with the doctor to improve the examination, and then follow the doctor’s instructions to do processing and treatment.