In summer, if you experience itching on the lower legs, it's important to consider summer dermatitis. Summer dermatitis is a seasonal skin disorder caused by hot weather, commonly affecting adults' limbs, especially the lower legs. The outer side of the lower legs, or the front part, typically shows symptoms. The characteristics of the lesion include localized bright red erythema with dense, medium-sized papules. Scratching can lead to scratch marks, scabs, and significant discoloration, but generally, there is no erosion or exudation. The condition is clearly related to temperature and climate, so it typically improves when the temperature drops, and can be cured by autumn or winter. It is important to maintain a living environment with good ventilation and cooling, wear loose clothing, and keep the skin clean and dry. Treatment mainly involves topical remedies, including applying calamine lotion and washing with decoctions of traditional Chinese medicine.