The symptoms of internal heat in men are divided into the following categories according to the causes: 1. The most common is deficiency of kidney yin and internal heat in men, manifesting symptoms such as dizziness and tinnitus, soreness and weakness of the waist and knees, hot flashes and night sweats, and irritability of the five hearts. 2. The symptoms include irritability, sores on the tongue and mouth, yellow urine, difficulty sleeping, insomnia and dreaminess, etc. 4.Deficiency of lung yin and deficiency of deficiency of lung yin and deficiency of heat, mostly accompanied by dry cough without phlegm or coughing up blood, and loss of weight. 5.External symptoms such as fever, cold, bitterness, dry mouth, thirst, dizziness, headache, body aches and pains, etc. are caused by external wind-heat or wind-cold evil entering the body and turning into heat.