A white line under the nail may be caused by genetic factors, nail fungus disease, etc., localized skin diseases.
1. Genetic factors: may be affected by congenital genetic factors, resulting in a white line under the nails, but there are no other uncomfortable symptoms, do not need special treatment.
2. Nail fungal disease: mainly due to the nail plate is infected by fungi, resulting in changes in the color of the nail plate, resulting in the appearance of the white line, may also be accompanied by nail plate deformation, brittle nails and other symptoms.
3. Psoriasis: patients are conscious of different degrees of itching, nail involvement is often manifested as “thimble-like” depression; palmoplantar pustulosis in psoriasis is often accompanied by nail involvement, which may appear as punctate depression, transverse grooves, longitudinal crests, turbidity of the nail, nail peeling and pus accumulation under the nails, etc., and so there is also the manifestation of white lines on the nails.
4. flat moss: typical lesions for the rise of purple-red flat papules, border clear, the surface has a waxy film, can be seen in white glossy dots or shallow white reticular stripes, nail involvement can cause the deck thickening or thinning, longitudinal ridge, longitudinal grooves, or nail pterygium, but also due to progressive atrophy caused by the loss of nails, but also the nails with a white line on the manifestation of the.
A white line on the nail, there may be other causes, should be timely to the hospital.