Why do you feel very tired and want to sleep in the morning this season?

In fact, spring sleep is a response to the physiological changes brought about by seasonal exchange. In the cold winter, the human body is affected and stimulated by low temperature, the capillaries of the skin contract, the blood flow is relatively reduced, the sweat glands and pores are closed, the heat dissipation is reduced, and the normal body temperature is maintained. After entering the spring, with the increase of temperature, human pores, sweat glands and blood vessels begin to relax, and skin blood circulation is also vigorous. So the blood supply to the brain will be relatively reduced. As the weather gets warmer, the metabolism is gradually vigorous, the oxygen consumption is increasing, and the oxygen supply to the brain is inevitably insufficient. Coupled with the benign stimulation of warm temperature, the brain is inhibited to some extent. So people will feel sleepy, feel sleepy, and always feel that they don't get enough sleep. However, it is worth noting that it also contains some pathological factors, and some "spring sleep" is the manifestation of the disease. For example: depressive symptoms before psychotic episode; Low fever and lethargy before hepatitis; Sleepiness caused by chronic causes such as diabetes and heart disease. Other studies have found that patients with hypertension have frequent sleepiness and yawning in spring, which is likely to be a precursor to stroke. Therefore, the "spring sleep" caused by the disease should be checked and diagnosed in hospital in time.