After blowing the fan for so many years, have you blown it right?

Although it's still in the rainy season
But the weather will definitely get hotter and hotter in the future
Our cooling artifact electric fan
It's about to come out in pink
Maybe someone is already using it
While delivering a hint of coolness
Have you ever noticed the health hazards caused by blowing fans
cold?
Facial nerve paralysis?
scapulohumeral periarthritis?
Symptoms such as low back pain?
Female endocrine?
Frequently blown fans may have the following hazards
1. Easy to catch cold and catch cold. Blowing a fan can quickly evaporate water on the body surface, and the evaporation of water can quickly decrease the temperature on the body surface. This makes it easy to catch a cold, especially if you have already caught a cold, which can worsen the condition. Blowing a fan during sleep can become even more severe.
2. Affecting the secretion of body fluids and endocrine disorders. Blowing a fan will lower the temperature of the body surface, and the sweat glands and pores will close. "In this way, the temperature inside the body cannot be lowered, but it becomes higher, leading to symptoms such as headaches and nausea.".
3. Not good for joints. Long-term fan blowing can cause joint pain, which is because the temperature at the joints is very low when blowing the fan, and the temperature away from the fan is very high. Such a cold and hot spell can make joints unbearable.
4. Stroke risk. Use a fan to blow against your head when you have a cardiocerebral stroke; A blower fan is suitable for shaking your head. If the fan blows against the head, the scalp temperature decreases, and the reflex causes contraction of cerebral blood vessels, which also reduces cerebral blood flow. For elderly people with cardiovascular and cerebrovascular diseases, severe cases can lead to stroke.
Is it a bit intimidated to see the various hidden dangers that may arise from the above?
In fact, if we use fans scientifically, we can reasonably avoid these disadvantages.
Precautions for using electric fans
1. The wind speed should not be too fast: It is best to control the indoor wind speed at 0.2 meters/second to 0.5 meters/second, especially in well-ventilated rooms and places with excessive wind, the wind speed of electric fans should not be too fast.
2. It is not suitable to blow directly at people: Especially when you are weak or sweating profusely, it is best to let the fan blow towards a corner. When blowing an electric fan, it is best to keep the distance from people at a distance of 2 meters to make the blowing wind uniform and gentle.
3. Do not blow for a long time: The electric fan should be blown and stopped, and the swinging head electric fan should be used. For children, the elderly, and the frail, it is more appropriate to use fewer electric fans for blowing, but electric fans can be used to regulate indoor airflow, thereby indirectly cooling. Generally, it is advisable to blow for half an hour to one hour at a time.
Do not blow immediately when sweating: When sweating heavily, do not blow immediately while sitting or lying still. Because at this time, the entire body's surface blood vessels expand and are suddenly blown by a cool wind, which often causes blood vessel contraction and immediately stops sweating, resulting in a loss of balance between heat production and heat dissipation in the body, and the excess heat cannot be excreted.
5. Less ventilation for those with poor resistance: After the cold wind blows, local defense functions decrease, and viruses and bacteria invade, resulting in upper respiratory tract infections, muscle and joint pain, and some even abdominal pain and diarrhea.
6. Avoid blowing during sleep: When a person is asleep, the function of various organs of the body decreases to the lowest level, all reflexes disappear, and immunity decreases, which can easily lead to diseases.