Children with dark armpits, several common factors include heredity, poor personal hygiene or improper care, folliculitis and so on. 1. Heredity: If someone in the family also has the symptom of dark armpits, consider the possibility of heredity, and do not need special treatment. 2. Poor personal hygiene or improper care: armpits are also easy to accumulate dirt, if you often do not wash the armpits, or fat body type caused by the armpits friction, can not be effectively cared for, are very easy to appear in the armpits of the symptoms of blackness. You can wash your armpits, maintain personal hygiene, and avoid excessive friction. 3. Folliculitis: if in addition to the dark armpits are accompanied by localized small bumps, pain and other symptoms, to consider the possibility of folliculitis is relatively large. Children’s armpits may also be black for other reasons, if you find the child’s skin abnormalities, or need to go to the hospital for a detailed examination, to rule out the possibility of disease, do not blindly give the child medication, to avoid misunderstanding the condition.