Once the summer legs itch the more you scratch the more itchy may be solar urticaria, insect bite reaction, eczema and other diseases. 1. Solar urticaria: Solar urticaria is mainly induced by sunlight, and its pathogenesis is not yet clear. In summer, due to strong light, patients in the skin exposure to sunlight for a few minutes will appear itchy, and accompanied by erythema, irregular edema and other symptoms, appeared in the summer legs itchy the more you scratch the more itchy situation. 2. Insect bite reaction: insect bite reaction is mainly lice, fleas, mosquitoes, bedbugs and other insects bite induced skin allergic reaction. As summer is a high season of insects, patients can appear as a wind ball like pimples, small blisters, itching and other symptoms, manifested in the summer legs itchy scratching the more itchy. 3. Eczema: the cause of eczema is not yet clear, may be genetic, low immunity, hormone level changes, infection and other factors. Patients will appear itching, pimples blisters and other symptoms, can appear in the summer legs itchy more scratching the more itchy situation. There are many reasons for itchy legs in summer, so it is recommended to identify the cause of the disease and actively cooperate with the doctor to take relevant treatment measures.