Seasonal red bumps itchy, mostly due to skin allergies such as hives, or scabies infection, etc., should be promptly consulted to identify the cause of the disease. 1. Urticaria: due to the change of temperature during the change of season, may also be inhaled pollen, animal dander, or eat fish and shrimp and other food, can lead to the occurrence of urticaria, appearing on the body of red bumps of varying sizes, accompanied by the symptoms of itching. Oral antihistamine drugs such as loratadine can be prescribed, but also use glycerine lotion, Benadryl cream and other topical drugs. 2. Scabies: Scabies occurs in the fall and winter seasons, is due to the human scabies mite parasites in the skin and lead to infectious skin diseases, mainly manifested as red spots, pimples, and at the same time accompanied by intense night itching. Scabies patients commonly used ivermectin and other antiparasitic drugs, can also be used externally sulfur ointment, clove basil cream and other medications, drug treatment is ineffective patients, can be surgically removed scabies nodules. Seasonal itchy red bumps may also be caused by other reasons, it is recommended that the patient timely consultation, to identify the cause of the disease, under the guidance of the doctor symptomatic treatment, the above medication need to follow the doctor’s instructions.