Red bumps on itchy skin in summer may be caused by prickly heat, summer dermatitis or papular urticaria. Doctors take different treatments according to different causes, and the treatments include medication. 1. Prickly heat: Prickly heat is caused by high summer temperatures and high humidity, resulting in the blockage of small sweat glands. Mild prickly heat does not require special treatment, and will disappear on its own after the skin cools down and dries out. If the symptoms are serious, you can use topical medication, such as prickly heat powder and hydrocortisone solution. 2. Summer dermatitis: summer dermatitis is mainly caused by hot climate, high temperature, high humidity, plus dust and other skin irritation. Summer dermatitis can be treated with topical medications, such as 1% phenol glycerite lotion, 1% peppermint glycerite lotion and so on. 3. Pemphigus urticaria: mosquitoes increase in summer, mosquito bites may trigger pemphigus urticaria. Pemphigus urticaria can be treated with medication, such as hydrocortisone butyrate cream, benadryl cream, etc. Summer itchy skin red bumps patients should follow the doctor’s advice treatment, do not blindly treatment, so as not to delay the condition.