What’s with the dark circles under the eyes of a five-month-old baby?

Dark circles under the eyes of five-month-old babies may be related to genetic factors, but also to factors such as lack of sleep or acute infections.
1. Heredity: If the baby’s immediate family members have dark circles under the eyes, this symptom is usually passed on to the next generation.
2. Lack of sleep: babies who do not get enough sleep, often stay up late or have their biological clocks reversed can also cause dark circles under the eyes.
3. Acute infection: If the baby has a respiratory tract infection or cough, nasal congestion and other symptoms during the appearance of dark circles under the eyes, it belongs to the situation caused by acute infection.
Five months baby black eye, may also be related to trauma and other factors, it is recommended that timely to the hospital for relevant examinations, clear cause of the symptoms after active treatment.