Coffee-colored vertical lines on nails may be related to nevus of nail, nail melanoma and other diseases.
1. Nail nevus: it is a kind of pigmented nevus located under the nails, which is also a kind of benign tumor, and the disease will have a certain chance of malignant transformation, and it mainly manifests in the clinic as black, light brown or coffee-colored lines arranged in vertical shape.
2. Nail melanoma: in clinic, it is mainly manifested as large black or coffee-colored plaques and vertical stripes under the nail, usually the distribution and interval of the stripes are uneven and symmetrical. Nail melanoma belongs to a kind of malignant tumor, which needs to be removed by timely surgical treatment because of the high degree of deterioration.
Due to the individual differences in clinical manifestations, the specific situation requires an interview with a doctor and regular review.