Fear of cold, cold and drowsiness may be due to Yang deficiency, Yang deficiency and cold syncope or Yang deficiency and phlegm condensation. When there is a deficiency of yang qi in the whole body, the body cannot be warmed, so there will be a fear of cold and cold; yang deficiency cannot warm the brain orifices, so there will be drowsiness. In addition, simple Yang deficiency syndrome will also appear in the form of scanty urine and loose stools. Yang deficiency cold syncope is based on Yang deficiency, cold evil directly in the (external evil through the surface of the muscle directly violates the internal organs), cold paralysis blocking the meridians and internal organs formed. Yang deficiency cold syncope, in addition to fear of cold, cold and sleepy, there will be a greenish color, cold extremities (cold extremities, even cold to the elbows and knees), claws and nails purple, abdominal pain, and other symptoms. Yang deficiency phlegm congealment syndrome refers to a syndrome formed by cold phlegm congealment due to the inability of yang deficiency to transport and transform water and dampness. In addition to cold and drowsiness, symptoms such as chest tightness, dizziness, and phlegm are also present in Yang deficiency phlegm coagulation syndrome. If the above symptoms occur, you should go to the hospital in time, to clarify the cause of the disease, not to treat yourself, so as not to delay the condition.