Scabies is an infestation of tiny bugs called mites on the skin. It causes a small red rash and intense itching. This infection is very contagious. It often spreads from child to child while children are sleeping together in the same bed or have close personal contact.
Cradle cap (infant seborrheic dermatitis) is scaly patches on a baby's scalp. Cradle cap isn’t serious, but it can cause thick crusting and white or yellow scales. Some babies can also have seborrheic dermatitis in the diaper area, and on the face, neck, and trunk. Cradle cap usually clears up within the first year.
Urticaria, or hives, is a problem in which red, itchy, and swollen areas show up on the skin. It usually happens as an allergic reaction from eating certain foods or taking certain medicines. Though, sometimes the cause may be unknown. Hives can vary in size from one-half inch to several inches in size. Hives can show up all over the body or just on one part of the body.