Pimples and itching on the body may be caused by a variety of diseases. Common ones include urticaria, eczema, contact dermatitis, etc.

Urticaria usually manifests as wheals of varying sizes, accompanied by obvious itching, and may be related to allergies, infections and other factors. Antihistamines such as loratadine and cetirizine can be used for treatment.

Eczema can appear as erythema, papules, blisters, etc., accompanied by severe itching, and the cause is complex. Treatment generally includes topical corticosteroid ointments, such as mometasone furoate cream, and oral antihistamines.

Contact dermatitis is mostly caused by contact with allergens or irritants, such as certain cosmetics, metals, etc. Treatment should first avoid contact with allergens, then topical calamine lotion can be used to relieve itching, and when symptoms are severe, oral glucocorticoids can be taken.

However, specific diagnosis and treatment require visiting the dermatology department of the hospital. The doctor will diagnose and formulate corresponding treatment plans based on the specific situation.