Hello, your condition may be round corner disease of hair, which may be related to heredity. More common in young people. The lesions are needle-shaped, with hair follicle papules at the top and hair roots protruding or curling in the middle. It mostly happens in front of or outside the arms and legs. Dry in winter, no symptoms.

Suggestion:

The prognosis is good and there is no effective treatment. 0.05%-0. 1 tretinoin ointment or 5% salicylic acid solution can be used externally. When the skin is dry, you can use a fat skin care agent for external use. You can also take vitamin a orally. I wish you good health!