There are many factors that make a 30-year-old man feel tired and weak every day, and the common factors are physiological factors, kidney yin deficiency and insufficient qi and blood. 1. Physiological factors: If the recent sleep is not good, often stay up late, or work more tired, more pressure, etc., it is easy to appear tired, weak phenomenon, this situation is normal, you can avoid staying up late, more rest, reduce the pressure will be relieved. 2. Qi and blood deficiency: If men have the phenomenon of Qi and blood deficiency, it is easy to reduce the function of internal organs, the emergence of premature aging, so it is easy to have fatigue, fatigue and drowsiness and other symptoms, some people will also be accompanied by cold, tinnitus, dizziness and other phenomena. 3. Kidney yin deficiency: and excessive intercourse has a greater relationship, the patient will be insomnia, dreamy, tinnitus, dizziness, hot flashes (a burst of fever) night sweats (sweating abnormally after falling asleep, wake up sweating to stop) and other phenomena, and in serious cases, there will be premature ejaculation, spermatorrhea and other manifestations, the patient will usually feel very tired, no energy. It is recommended that patients maintain a regular work and rest schedule, and go to the hospital in time if the situation is serious.