Yang deficiency in children mainly includes spleen yang deficiency, kidney yang deficiency, and spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys), etc. Patients can take warming and tonifying medicines as prescribed by the doctor for treatment. 1. Spleen Yang Deficiency: If the deficiency of yang qi is caused by spleen yang deficiency, symptoms such as loss of appetite, abdominal pain, swelling of limbs and loose stools may occur. It can be treated with medicines that warm the spleen and stomach as prescribed by the doctor, such as Pills for Warming the Spleen and Stomach, and Pills for Strengthening the Middle Jiao Qi. 2. Kidney yang deficiency: If the patient is suffering from yang deficiency due to kidney yang deficiency, symptoms such as lumbar and knee soreness and weakness, lower limb edema, and long and clear urination may occur. It can be treated with medicines that warm and replenish kidney yang (warming and replenishing kidney yang) as prescribed by the doctor, such as Right Angelica Pill and Jin Gui Kidney Qi Pill. 3. Spleen and kidney yang deficiency: If the patient is suffering from yang deficiency caused by spleen and kidney yang deficiency, both of the above mentioned symptoms of yang deficiency may occur, which can be treated with medicines that benefit qi and nourish the spleen and kidneys as prescribed by the doctor, such as Sishen Pill and Guiqi Velvet Pill. It is recommended that children with yang qi deficiency consult a doctor in a timely manner to replenish yang under the doctor’s guidance, so as to avoid any delay in their condition or adverse reactions due to unauthorized use of medication.