Deficiency diseases can be summarized as qi deficiency, blood deficiency, yang deficiency and yin deficiency. The symptoms are different depending on the type of evidence. 1. Qi deficiency: Symptoms include weakness of the limbs, laziness in speech, shortness of breath, spontaneous sweating (involuntary sweating during the day, aggravated by sweating with slight movement), and heartburn. 2. Blood deficiency: Symptoms include vomiting blood or blood in the stool, or women’s leakage (excessive menstrual flow or dribbling), dizziness and blurred vision. 3. Yin deficiency: Symptoms include dry cough, hemoptysis, dry mouth and throat, hot flashes (a burst of fever), night sweats (abnormal sweating after going to sleep, but sweating stops after waking up), flushing of the cheekbones (reddish color of the cheekbones on both sides of the face), and a red tongue with little fluid. 4. Yang deficiency: Symptoms include reduced diet, loose stools or undigested food in the stools, weak waist and knees (a feeling of weakness in the waist and knees), fatigue (mental exhaustion, physical weakness), cold limbs (fear of cold, cold limbs), impotence and slippage of the spermatozoa, urination, pale face, etc. If the patient has any of the above symptoms, he should take prompt action to prevent them from occurring. If the patient has the above symptoms, he/she should go to the hospital in time.