The black and purple bags under the eyes of the child may be caused by lack of sleep, may also be caused by sinusitis and other diseases, and may be caused by congenital heart disease. 1. Physiological factors: If the child does not have enough sleep, the local blood circulation around the eyes is stagnant, which can lead to the symptoms of the child’s eye bags black and purple, this is a normal physiological phenomenon, supplemental sleep can be improved. 2. Sinusitis: Because the sinuses are distributed around the eyes, so when sinusitis occurs, the sinus mucosa of the tissue congestion, swelling, pressure on the surrounding area, which can affect the blood circulation around the eyes, leading to the child to appear black and purple bags under the eyes of the symptoms. 3. Congenital heart disease: congenital heart disease is a disease of abnormal development of the heart and large blood vessels, children with this disease can appear black and purple bags under the eyes, the child can also appear all over the body bruises, growth retardation, feeding difficulties, fatigue, sweating, shortness of breath and other symptoms. After eliminating physiological factors, if the darkening and purpling of the bags under the eyes persists, the child should consult a doctor to find out the cause and ask the doctor to take care of it.