1, nosebleed to raise the chin The only advantage of this approach is that the nosebleed will not flow to the floor, but will not stop the nosebleed, but will let the nosebleed flow into the throat, and may even cause vomiting and suffocation. The correct approach is to stuff a small ball of cotton in the nostril of the nosebleed, gently press the nose and tilt the head forward, or around the neck of an ice towel or a wet towel can also stop the bleeding. 2, scrape off armpit hair, can reduce sweating Scraping armpit hair for stopping sweat production does not have any effect, on the contrary, after scraping armpit hair, armpit because of the discharge of water can not hide and leave sweat stains on the clothes. Moreover, shaving armpit hair also tends to cause hair root abscesses. The correct practice is to wash the sweaty armpits before the decomposition of sweat. 3, sweat is smelly Sweat is odorless. However, sweat contains a lot of organic substances, which are nutritious to bacteria, but it is when the bacteria decompose the sweat that unpleasant excretions are produced. 4, brush your teeth immediately after a meal Brushing your teeth immediately after eating something will make the acid in the food erode the enamel, which will only strengthen the destructive effect of the acid in the food on the teeth. The correct approach is to rinse your mouth first, and then brush your teeth after half an hour. 5, the same effect of drugs on men and women The latest research shows that the effectiveness of drugs for men and women is absolutely not the same. For example, aspirin can help men to prevent myocardial infarction, but the effect on women is not very effective. Like anesthetics such as fat-soluble drugs, women with the dose to be greater than men. 6, comb your hair 100 times a day is good for health Excessive combing will stimulate the sebaceous glands on the scalp, especially oily hair, should be less combing. If it is dry hair long hair, it is more suitable for more combing. However, it is best to use natural bristles made of combs, which is less likely to hurt the scalp. 7, walking than standing energy consumption Because, standing, legs have been bearing the weight of the body, both feet can not relax. While walking is a leg to bear the weight, the other is relaxing. 8, blood sweet people are easy to be mosquito bite Mosquitoes simply can not smell the flavor of blood. But mosquitoes are particularly sensitive to heat, even 0.05 degrees Celsius difference can be distinguished. Therefore, when we whistle out carbon dioxide and water vapor, it will attract mosquitoes. 9, the toilet is a very unhygienic place often cleaned with water than the stereotypical impression of a much cleaner toilet. Family bacteria research experts found that most of the bacteria in the home are hiding in the refrigerator wall drain, the amount of bacteria on the rag than the toilet. 10, smart people with big brains The size of the brain is not the key to determining smart or not, the brain structure is the most important. The function of the human brain is determined by the neural network, and the low IQ is because some of the functions in this area have died, and has nothing to do with the size of the brain.