Several rashes are common among infants, including cradle cap, diaper rash, heat rash and eczema, according to Mayo Clinic. Evaluation by a pediatrician or other medical consultant is necessary for rashes of unknown origin.
Cradle cap is a common rash on the baby's scalp that appears as greasy or crusty yellow patches on the scalp. It is most common in newborns and babies up to 6 months old, as reported by Mayo Clinic. Treatment involves using a mild baby shampoo to loosen up the scales and then brushing the hair and scalp. Putting a few drops of baby oil on the scalp may also help.
Bright red skin on the baby's buttocks can indicate diaper rash. This rash is caused by prolonged exposure to feces or urine, and can be treated with diaper rash cream and more frequent diaper changes. Particularly stubborn rashes should be evaluated by a physician.
Heat rash is common among babies, especially during hot weather. Dressing the baby in lighter clothing and keeping the baby cool can prevent heat rash. The rash usually goes away on its own.
Rash caused by eczema is usually scaly, itchy and dry and may cause patches that ooze or develop crusts. Bathing the baby less frequently to avoid drying the skin and using unscented lotions can help.