Vertical stripes on the fingers may be caused by trauma, onychomycosis and other diseases.
1. Trauma: If the fingers are subjected to collision, pressure and other traumatic injuries, it may lead to the rupture of capillaries under the skin, which may cause the appearance of vertical stripes on the nails.
2. Naevus of the nail: the formation of nevus of the nail may be related to the activation of melanocytes under the nail and other factors, and the patient’s nails may appear a black line, which is mostly in the form of vertical stripes.
There may be other reasons for the long vertical stripes on the fingers, so you should pay attention to protecting your nails and keeping them clean and tidy, and try to avoid localized injuries. If the nails appear abnormal, it is recommended that the patient go to a regular hospital for relevant examinations to clarify the cause of the disease.