It is divided into two parts: yin deficiency and fire, but they are causal pathologies of each other. Yin deficiency generally causes dry mouth, dizziness and tinnitus, soreness and weakness of the waist and knees, red tongue with little coating, irritability of the five hearts, hot flashes and night sweats, etc. In addition, Yin deficiency also leads to slow reaction and memory loss. Fire will cause redness, dizziness, red tide, bitterness and bad breath, insomnia and dreaminess, explosive temper, irritability, etc. And it is easy to have hunger, but can not eat much because it is caused by deficiency. When the above symptoms appear on men, such as irritable heat in the five hearts, hot flashes and night sweats, dry lips and mouth, red tongue with little or no moss, as well as restlessness, dizziness, insomnia and dreaminess, hypersexuality and body wasting, it can basically be diagnosed as a result of Yin deficiency and fire. When patients have the above symptoms, they can take Chinese medicine such as Liu Wei Di Huang Wan or Zhi Bai Di Huang Wan to regulate, or ask the Chinese medicine practitioner to diagnose and treat the symptoms according to the Chinese medicine practitioner’s advice. At the same time, in daily life, life and rest should be regular, avoid staying up late or overworking. Do not eat fried barbecue and other junk food, keep a light and balanced diet, eat more vegetables and fruits, and do proper exercise in general.