Baby acne is caused by exposure to the mother's adult hormones. The little white dots often seen on a newborn's nose represent an abnormal amount of normal skin oil that is a result of these hormones. Acne usually occurs between 2 and 4 weeks of age but may appear up to 4 months after birth and can last for 12 to 18 months. Cradle cap causes greasy, scaling , crusty patches on the scalp that appear in a baby's first 3 months. It usually goes away by itself, but some cases may require treatment with medication.
Prickly heat causes rash or blotches during hot weather or in a hot environment.
This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as location, quality, time course, aggravating factors, relieving factors, and associated complaints. Use the Symptom Analysis option to explore the possible explanations for a rash in a child under 2 years old, occurring alone or in combination with other problems. Change wet diapers as quickly as possible.