There are many situations to consider when you suddenly have mosquito bite-like bumps on your body. 1. Papular urticaria, also known as acute simple prurigo, is related to insect bites and allergic reactions induced by certain foods. . It usually occurs on the chest, back, waist, abdomen, calves and other parts of the body. It is more common in children. The rash is characterized by wheal-like papules. Pinhead-sized blisters or punctate blood scabs can be seen at the top. It is usually accompanied by severe itching. You can choose to take it orally. Antihistamines, commonly used such as ebastine, loratadine, etc., can be used topically, such as topical corticosteroids, such as mometasone furoate cream. 2. Consider it to be urticaria. The rash of urticaria is characterized by red wheals, which can be round, oval or irregular in shape. They can subside on their own within 24 hours and leave no trace after subside. You can choose oral antihistamines, common ones such as chlorpheniramine, cetirizine, etc., and apply calamine lotion topically.