Dizziness and weakness in children are commonly associated with upper respiratory tract infection, hypoglycemia, abnormal blood pressure, anemia, etc. It is necessary to go to the hospital to clarify the cause and give symptomatic treatment. 1. Upper respiratory tract infection: In the early stage of upper respiratory tract infection, children can have dizziness and weakness, and later they can have fever, cough, runny nose, sore throat, headache and general muscle aches. The main cause of upper respiratory tract infection is viral infection. If it is influenza virus, give antiviral drugs for treatment as prescribed by the doctor and use ibuprofen for symptomatic treatment; 2. Hypoglycemia: children may experience dizziness, weakness, weakness of limbs, cold sweat, etc., and need to measure blood sugar. If there is indeed hypoglycemia, the child can be given oral sugar water in time for mild cases, and in more serious cases, high sugar needs to be pushed intravenously in time to improve the symptoms; 3, blood pressure abnormalities: children dizziness, weakness should pay attention to the measurement of blood pressure, and observe whether it is due to abnormal blood pressure. Weak children may have dizziness and weakness due to low blood pressure, while fat children may have high blood pressure, which is not common but may also occur; 4, anemia: children with anemia may also have dizziness and weakness, so routine blood tests can be done to clarify whether there is anemia; 5, heart disease: children with dizziness and weakness may have congenital heart disease, such as Atrial septal defect, ventricular septal defect, etc.