Dark brown vertical stripes on the thumbnail should be treated according to the specific cause, which may be caused by trauma, onychomatous mole, fungal infection and so on.
1. Trauma: If you have suffered a violent impact, there will be bruising underneath the nail and black-brown vertical stripes will appear. This situation does not require special treatment, and the symptoms will gradually disappear as the new nail grows out, so do a good job of protecting it and avoiding another impact.
2. Nail nevus: Nail nevus is a benign melanocytic disease, most do not need treatment, but this disease has the risk of malignant transformation, if malignant transformation occurs, it should be timely surgery.
3. Fungal infection: Fungus invades the nail plate and nail bed, which will lead to nail lesions, including cloudy nail plate, discoloration, thickening and brittleness, etc. Anti-fungal medication is needed to treat the disease, which can be applied with amorphophallus powder, and oral itraconazole or fluconazole, and the nail needs to be pulled out in case of more serious symptoms.
If there are dark brown vertical stripes on the thumbnail, it is recommended to go to the hospital for early treatment. If you need to use drugs, you should strictly follow the doctor’s instructions, not randomly use drugs to avoid adverse effects.