Yawning all day and wanting to sleep may be related to long-term mental fatigue, hypothyroidism, diabetes, arteriosclerosis and other factors. 1. long-term mental fatigue: if daily stress is relatively large, often stay up late, sleep quality is relatively poor, resulting in excessive fatigue, there will be yawning all day and want to sleep, daily to maintain a good sleep, keep the mood smooth, avoid staying up late. 2. hypothyroidism: if the thyroid hormone secretion is insufficient, it will lead to hypothyroidism, and the sympathetic excitability will be reduced, which will lead to the situation of yawning and wanting to sleep. 3. diabetes: long-term diabetes can induce chronic damage to the nervous system, heart, etc., resulting in yawning, lack of energy, want to sleep all day long, to actively treat diabetes, pay more attention to daily rest. 4. arteriosclerosis: if you suffer from arteriosclerosis, it can cause insufficient blood supply to the brain, which will cause frequent yawning, dizziness, and want to sleep. If the situation of yawning and wanting to sleep all day long can not be relieved, you should go to the hospital in time for examination, to clarify the cause of the symptomatic treatment.