White dots on the legs, the first thing you need to consider is whether there is a history of skin inflammation. After the local skin inflammation subsides, it may cause hypopigmentation, and white dots will appear. Secondly, if the legs have been inadvertently sprayed with chemical liquids on the skin, it can also cause local skin damage and small white dots. In addition, some skin tissue lesions, will also be manifested as white dots. 1, senile white spots: is a kind of ageing, skin aging, melanocyte reduction caused by the round white spots, mostly seen in middle-aged and old, distributed in the chest, back, extremities and other parts. It is a round white spot with the size of a grain of rice to a green bean, and there may be a slight depression without any other symptoms, so there is no need for treatment. 2. It can be distributed in any part of the body, mostly on the trunk, but also on the face and extremities, mostly unilaterally. It is a common acquired pigment loss skin and mucous membrane disease. The cause of the disease is still unclear, clinical consideration and genetics, mental stress, immune system decline, endocrine dysfunction and other factors. The course of the disease is slow, easily delayed, and will gradually expand and increase. There is no specific treatment plan, and steroid drugs are commonly used in clinical treatment. In addition, white spots on the legs can occasionally be seen in diseases such as pityriasis albuginea and lichen planus, and it is recommended to seek medical attention in a timely manner to carry out targeted treatment.