Colds in children usually do not cause small amounts of tricuspid regurgitation, but they may cause small amounts of tricuspid regurgitation if the cold evolves into chronic bronchitis, or if the cold is accompanied by a low level of immunity that leads to infective endocarditis. Small amounts of tricuspid regurgitation are most often due to congenital factors, which are mainly due to incomplete closure of the tricuspid valve. In children, colds are usually unable to affect the heart and therefore cannot cause this symptom. However, children with colds need to be treated aggressively. If left untreated, when a child’s cold develops into chronic bronchitis, it can easily lead to narrowing of the bronchial tubes, which raises the pressure in the lungs and produces a small amount of tricuspid regurgitation. Or when the body’s immunity is low, bacteria may invade the tricuspid valve, causing destruction of the valve and producing regurgitation. Children’s colds are common illnesses that can cause sore throat, fever, runny nose and other symptoms, so parents should take their children to the doctor in time for treatment and should not be careless or blindly use medication.