Symptoms of red spots on the legs may be due to allergic purpura, folliculitis, mosquito bites and other factors, and can be relieved by applying emollients, anti-infective drugs, and glycerite lotion. 1. Anaphylactic Purpura: It occurs in the lower limbs, mainly in the extensor side of the calf, and in severe cases, it can spread to the upper limbs and trunk. Before the onset of the disease, there are often upper respiratory tract infection, low fever, general malaise and other prodromal symptoms, followed by the appearance of red papules, usually within 24 hours to develop into the tip of the needle to the size of the soybean purpura. Attention should be paid to rest and topical glucocorticosteroids such as Dinaid cream. 2. Folliculitis: the phenomenon of red dots on the legs, can not be ruled out due to Staphylococcus aureus infection caused by folliculitis, after diagnosis, you can cooperate with the doctor to choose the iodine solution sterilization, but also can be coated with mupirocin, fusidic acid cream anti-infection treatment. 3. Mosquito bites: the phenomenon of red dots on the legs, if it occurs in the hot summer, can not be ruled out due to mosquito bites, accompanied by symptoms of itching, can be applied by glycerite lotion, can play a role in stopping itching astringent. The phenomenon of red spots on the legs, there may be other reasons, need to cooperate with the doctor to improve the examination, to determine the cause and then do the treatment, can not blindly use drugs.