Mild tricuspid regurgitation in newborns may be caused by an underdeveloped heart or an incomplete closure of the tricuspid valve. Tricuspid regurgitation is a condition in which the tricuspid valve fails to close completely when the heart contracts, causing blood to enter the right atrium, resulting in tricuspid regurgitation. Mild tricuspid regurgitation in newborns may be caused by a young, underdeveloped heart or by an abnormal development of the heart, which may result in tricuspid valve insufficiency. Mild tricuspid regurgitation usually does not cause abnormalities, will not affect the life of newborns, usually do not need special treatment, close observation can be, if the tricuspid regurgitation aggravated, can be treated by surgery, daily attention should be paid to regular review, observe the development of the condition, when abnormalities occur timely treatment. It is recommended that patients seek timely medical treatment, standardized treatment under the guidance of the doctor.