Blackening at the root of the fingernail may be caused by contact with coloring substances, trauma, nail fungus and other reasons.
1. Contact with dyeing substances: If you come into contact with articles with dyeing substances such as potassium permanganate and hair dyes, it may cause the color to remain at the root of the nails, thus triggering the blackening of the root of the fingernails.
2. Trauma: If the fingernail is hit or smashed by heavy objects, it will cause the capillaries under the nail to rupture, causing bleeding and localized bruising, thus triggering the symptom of blackened fingernail roots.
3. Nail fungus: When infected by fungi such as Trichophyton rubrum and Trichophyton rubrum, these dermatophytes will stimulate the nail plate, triggering nail lesions, leading to black fingernail root symptoms, accompanied by brittle nails, edge of the warping and other symptoms.
There may be other reasons for the blackening of the fingernails, so it is necessary to go to the hospital for a complete examination to determine the cause of the problem and then give targeted treatment.