Diaper rash is very common.
Most babies who wear diapers will experience it to some degree. Factors that lead to diaper rash include continuously wet or infrequently changed diapers, and the use of plastic pants to cover the diaper. Most bumps and blotches on a newborn baby are harmless and clear up by themselves. By far the most common skin problem of infants is diaper rash, but there are some other skin disorders that are usually not serious unless accompanied by other symptoms. With an increase in heat and humidity, the sweat glands attempt to provide sweat as they would normally, but because of the blockage, this sweat is held within the skin and forms little red bumps, or occasionally small blisters in young infants.