Small red bumps on skin allergies in infants can be treated with antihistamines if caused by hives, or glucocorticoids if caused by tinea cruris. Small bumps in infants with skin allergies may be hives. The first step should be to avoid contact with the environment that may cause allergies, such as pollen and dust. Antihistamines, including levocetirizine, can be used to relieve the symptoms of allergy. If the itching is severe, topical antipruritic agents such as glycerite lotion can be used. Ringworm is also a common allergic skin disease in infants, with red spots and papules. Glucocorticoids such as mometasone furoate cream can be used. If the phenomenon of infant skin allergy is serious, you should go to the hospital in time for examination, the use of the above drugs should follow the doctor’s advice.