What does it mean when there are vertical black lines on the nails?
Apr 26, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Vertical black lines on the nails may be caused by physiological factors or trauma. In cases of nail matrix nevus, melanocytes producing excessive pigment can interfere with nail growth, leading to vertical ridges and dark lines. Physical treatments are generally ineffective, and surgical excision under medical guidance may be required. Additionally, fungal infections of the nail can also cause small black vertical lines, and prompt medical evaluation is necessary for accurate diagnosis.
Vertical black lines on the nails may be caused by physiological factors or pathological conditions such as trauma or nail matrix nevus, and treatment should be conducted under a doctor's guidance. Details are as follows:
I. Physiological Causes
As people age, the gradual reduction of collagen during the aging process may lead to longitudinal ridges and pigmentation on the nails. This is a normal physiological phenomenon and generally does not require special treatment if no other adverse symptoms are present.
II. Pathological Causes
1. Trauma
Trauma can damage the capillaries beneath the nail plate, causing bleeding that may appear as a vertical black line on the nail. However, as the nail grows, the black line usually fades and disappears gradually.
2. Nail Matrix Nevus
When melanocytes in a nail matrix nevus produce excessive pigment, they may interfere with the nail growth process, resulting in vertical ridges and black lines on the surface. Physical treatments are generally ineffective; surgical excision may be performed as directed by a physician.
In addition, fungal infections of the nail may also cause small black vertical lines, and medical evaluation should be sought promptly for accurate diagnosis.
