White streaks on the top of the calves may be associated with causes such as swelling lines, atrophic lichen planus and lichen planus. 1. Expansion lines: due to factors such as obesity or excessive body growth, the skin elastic fibers are overextended, resulting in skin fiber breakage, and white wavy stripes will appear, known as expansion lines. Generally there are no conscious symptoms, and there is no effect on health. Just may affect the aesthetics, you can use some topical emollients to improve the symptoms. 2. Atrophic lichen planus: mainly due to viral infections, endocrine disorders, metabolic abnormalities and other factors. It occurs in the lower limbs, when the lesions of flat papules atrophy, there can be light white spots, spots connected to the line will show white lines. 3. lichen planus: mainly caused by fungal infection, can show light white white spots, accompanied by fine dandruff and itching, need antifungal treatment. If there are white lines on the legs and scales when scratching, fungal infection should be considered to trigger superficial skin lichen planus. When there are white lines on the top of the calf, you can go to the dermatology department of the hospital for examination, to clarify the cause of the disease and treat the symptoms.