A child with a patch of red bumps is diagnosed with what is considered acute urticaria. Acute urticaria is an allergic skin disease in which the rash is dominated by wind clumps, or rheumatic bumps. The most common allergens include: 1) food, including fish, shrimp, beef and mutton, seafood, milk, nuts, etc. 2) external contacts, such as dust mites, pollen, mold, dust, etc. 3) drugs can also cause acute urticaria, common drugs include penicillin, sulfonamides, cephalosporins. 4) infections, such as viral infections, bacterial infections can also cause acute urticaria. 5) drugs can also cause acute urticaria. 5, physical factors, such as changes in environmental temperature, local pressure can also induce urticaria.