With the onset of winter and the sudden drop in temperatures, seniors seem to be particularly afraid of the cold. In order to keep out the cold some older people began to do everything possible to get warm. Medical experts remind us that people in the winter of some habits, in fact, is harmful to health, if not corrected in time will even cause disease. 1, drinking wine to keep cold Many people think that “drinking wine can keep cold”, in fact, this view is wrong. Because the wine heat production is not much, after drinking alcohol, because the skin blood vessel expansion, blood flow accelerated, and thus feel hot, but this is only temporary. With the skin heat dissipation increased and accelerated, but instead of consuming the body’s thermal energy, fever, body temperature will soon be reduced, the feeling of cold will be produced, and easy to cause headaches, colds and frostbite. Some old people also like to take advantage of the wine when the body heat bath, do not know that this is very dangerous. Because the stimulation of wine and hot water, will lead to the expansion of blood vessels on the surface of the body, a large amount of blood from the viscera to the surface of the body, the brain, heart, kidneys and other important organs, there will be ischemia and hypoxia, but also prone to angina pectoris and myocardial infarction. Frequent drinking, not only easy to lead to unclear mind, lethargy, cause gout and other diseases, but also easily lead to gastritis. In addition, as drunkenness often leads to uncoordinated movements and unsteady gait, and the bathroom floor is slippery, it is easy to fall and cause fractures. Therefore, the elderly after drinking, must not rush to bathe. 2, scarf mask against cold wind Some people all day long with a scarf around the mouth or wearing a mask, in fact, this will reduce the ability of the person’s cold. The human nasal cavity has a lot of blood vessels, there are many spongy blood vessel network, so that the nasal blood circulation is vigorous. Nasal cavity and the whole surface of the airways are covered with many mucous membranes, under the mucous membrane there are microvessels. When the nose inhales cold air, through the curved pipe into the lungs, the temperature of the air is close to body temperature. This physiological function of the human body can be enhanced through exercise, thereby improving the ability of people to withstand the cold. If you wear a mask all day long, the mucous membrane of the nasal cavity and the whole inhalation tract will not be exercised, and it will be easy to catch a cold if it is slightly chilled. In addition, when people in the whistle, scarf or mask on the tiny wool fibers and bacteria will be inhaled into the lungs, causing respiratory tract infection. 3, drink less water to prevent more urine winter sweat less, relatively more urine, which is a normal phenomenon. Some old people worry about urine and get up at night, will intentionally control the drinking water, and even porridge and soup do not dare to drink. Do not know, this is very dangerous. Because most of the elderly body water than young adults less, if less water, will be harmful to the health of the elderly. Lack of water will lead to increased blood viscosity, coupled with cold stimulation, blood flow will slow down, easy to induce cerebral thrombosis and angina. Therefore, the elderly should drink an appropriate amount of water before meals, before going to bed and after getting up, and many times. If necessary, you can also add a small dose of enteric-coated aspirin tablets to improve the viscosity of the blood, to prevent the occurrence of stroke and myocardial infarction. 4, frostbite with a fire grill Cold winter, some elderly people often freeze hands and feet, face, etc., frozen tissue vasoconstriction, local skin pale, cold, hard, numbness. Some people think that frostbite with fire will be better. In fact, this is wrong. Frostbitten places, first vasoconstriction, and then vasospasm occurs, impeding blood flow. If you bake the frostbite with fire, the blood vessels on the surface will dilate, while the deeper blood vessels are still in spasm. Due to poor blood return, the subcutaneous tissue lacks oxygen, metabolic products can not be discharged, will make frostbite aggravated. Therefore, after frostbite, use warm water to slowly rewarm. Can be used 40 ℃ -42 ℃ constant temperature hot water immersion, a moment can not get warm water can be local hand rubbing or placed in the arms, armpits, slowly rewarming is appropriate, do not directly massage the affected area with snowballs and towels and hard massage, do not bake with fire to deal with the water. 5, closed doors and windows without ventilation Heating has become the office space, one of the main ways of heating residential homes in winter. In the heating environment, doors and windows closed, poor air circulation, the room carbon dioxide concentration will be 3 to 5 times higher than the original, in the lack of oxygen concentration will also be significantly reduced. When the room temperature is too high, many elderly people will appear to varying degrees of internal heat and external cold “strange disease”: dry nasopharynx, chest tightness, dizziness, sweating, blood viscosity increases, pulse rate, blood pressure changes, decreased urination, weakness, etc., which is the indoor “warm air” to the hot! This is the indoor “warm air” to heat out the “warm air disease”. Prevention of “warm air disease”, should pay attention to create a microclimate in the room. Room temperature will be maintained at 18 ℃ -24 ℃, humidity 50% -60% is appropriate. To open the window to ventilate, keep the indoor air fresh, generally open the window in the morning and evening to ventilate once, pay attention to avoid convective wind, each time to open the window time of not less than 30 minutes.