Men who feel particularly tired may be caused by overwork, but also by malnutrition, hypothyroidism and other diseases. 1. Overwork: If you stay up late for a long time or have poor sleep quality, or if you do physical labor for a long time, you may be overworked, which may lead to special fatigue. 2. Malnutrition: Malnutrition may be related to factors such as insufficient or imbalanced nutritional intake and consumptive dysfunction. Patients may have symptoms such as fatigue, emaciation, weight loss, mental depression, etc. It may be accompanied by dry skin, water-electrolyte disorders, and hypokalemia. 3. Hypothyroidism: Hypothyroidism may be related to thyroid hormone utilization disorder, autoimmune diseases, medications and other factors, patients may experience symptoms such as chills, unresponsiveness, fatigue, joint pain, memory loss and so on. If men experience particular fatigue, they should go to a regular hospital for a checkup to clarify the cause of the disease after excluding the factor of overwork.