Morning bumps on the calves may be hives, contact dermatitis, eczema and other diseases. 1. Urticaria: related to a variety of factors, if the temperature difference in the morning, respiratory inhalation of allergic substances, as well as skin contact with allergic substances, may lead to patients with small bumps, accompanied by itching symptoms. 2. Contact dermatitis: mainly due to skin contact with exogenous substances, thereby stimulating the skin or triggering an allergic reaction. If the patient is allergic to the composition of the bed sheet, or allergic to the clothes, may induce contact dermatitis. Appears in the morning on the calf pimples, blisters, itching, burning, swelling and pain and other symptoms. 3. Eczema: If the patient is allergic to pollen in the air, or over-cleansing the skin in the morning, eczema may be induced. Symptoms such as pimples, papules, blisters, vesicles, itching, etc. appear. There are many reasons that lead to goosebumps on the calves in the morning, and it is recommended that patients go to a regular hospital to clarify the cause of the disease.