The dosage of boiled water with ginger for colds is usually 3-9g, which is decocted in a casserole and drunk after removing the dregs. Ginger is mildly warm and pungent in nature, belonging to the lung, spleen and stomach meridians, and its effects include warming the spleen and stomach to stop vomiting, dispersing cold and relieving the surface, warming the lungs and relieving cough (warming the lungs to stop coughing), etc. Ginger can sweat and relieve the surface by sweating. Ginger can sweat away the evils on the surface of the body (by sweating), and can be combined with brown sugar or green onion to assist in the treatment of mild cases of wind-cold colds. Colds are classified into wind-cold, wind-heat, summer-dampness and deficiency colds, which need to be treated with pungent-warmth, pungent-cooling, summer-heat-cleansing and deficiency-nourishing methods respectively, and can be treated with Chinese herbal prescriptions such as Jingpang Defenestrant and Poisonous Dispensary, Yinqiao San, Xinjia Elshotsholtzia Drink and Ginseng-Su Drink. These prescriptions should be used under the guidance of a doctor. Ginger boiled in water is only effective for wind-cold colds and has limited medicinal effects, and cannot be used to treat the disease. People with colds should pay attention to nursing care, eat a light diet, and consult a doctor if they have any other symptoms.