Coldness in the undershirt is usually due to coldness in the body, and medicines need to be taken according to the symptoms. Spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys) can be treated with Radix Rehmanniae Pills, heart yang deficiency can be treated with Xinbao Pills, and watery lungs can be treated with Xiao Qinglong Granules. 1. Spleen and kidney yang deficiency: Clinical symptoms include abdominal distension, diarrhea, loss of appetite, fear of cold and coldness, lack of warmth in the limbs, pale and fat tongue with white fur, and weak pulse. The patient can be treated with the Pill. 2. Heart Yang deficiency: clinical symptoms include panic, palpitation (rapid heartbeat, often accompanied by panic), shortness of breath, asthma, pale tongue with white coating and weak pulse. You can take Xinbao Pills. 3. Lungs with watery drinks: clinical manifestations include cough, coughing up white phlegm and saliva, shortness of breath, cold back, pale tongue with white coating, and sunken stringy pulse. You can take Xiao Qing Long Granules. Allergic to the three proprietary Chinese medicine ingredients are prohibited, pregnant women should be cautious. Do not eat cold, greasy, spicy and stimulating food during the period of taking the medicine. To take proprietary Chinese medicines, it is necessary to recognize the evidence of the use of medicines, please take under the guidance of a traditional Chinese medicine practitioner.