Wearing a hat and a pair of socks when sleeping can play a role in preventing cold and keeping warm. Studies by Swedish physiologists have confirmed that people who sleep in socks and hats have dilated blood vessels in their lower limbs, head and neck and can fall asleep quickly. Many patients with intractable insomnia can often recover without drugs. More importantly, wearing a garter cap to sleep can also avoid the formation of thrombosis and greatly reduce the incidence of cerebral infarction. At the same time, wearing a sock cap to sleep is very helpful to prevent colds, bronchial asthma and ischemic necrosis of diabetic limbs. Generally speaking, sleeping with a hat depends on the regional and environmental temperature, personal habits and age. To be sure, it will not affect health. Wearing a nightcap helps to keep warm when sleeping. Disadvantages: it has a certain impact! At night, people's various functions are in a low state! But the brain should maintain normal blood circulation, wearing a plunger, especially a tight plunger, has a certain impact on the blood circulation of the brain, leading to slight dizziness the next day! 1, which will directly affect the scalp "breathing"; 2. Obstruct the normal circulation of brain blood.