many common sense heard in daily life is wrong! For example, if you raise your chin when you have nosebleed, it will only make the nosebleed flow back to your throat, and may even cause vomiting and suffocation; Brushing your teeth immediately after eating 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.

error 1: raise your chin when bleeding from the nose

the only advantage of this method is that it will not flow the nose blood to the floor, but will not stop the nose blood, but will let the nose blood flow into the throat, and may even cause vomiting and suffocation. The correct approach is to put a small cotton ball in the nostrils with nosebleed, gently press the nasal wings, tilt the head forward, or wrap an ice towel or wet towel around the neck to stop bleeding.

error 2: scraping the armpit hair can reduce sweating

scraping the armpit hair has no effect on preventing sweat. On the contrary, after scraping the armpit hair, the armpit leaves sweat stains on the clothes because the water discharged from the armpit cannot be hidden. Moreover, scraping axillary hair is also easy to cause hair root abscess. The correct way is to wash the sweaty armpits before the sweat decomposes.

error 3: sweat is smelly

sweat has no taste. However, sweat contains a lot of organic substances, which have nutrients for bacteria, but bacteria produce unpleasant excreta when they decompose sweat.

error 4: brush your teeth immediately after eating

brushing your teeth immediately after eating will cause the acid in the food to erode the enamel, which will only strengthen the destructive effect of the acid in the food on the teeth. The correct way is to rinse your mouth first and brush your teeth after half an hour.

error 5: drugs have the same effect on men and women

the latest research shows that drugs have absolutely different effects on men and women. For example, aspirin can help men prevent myocardial infarction, but it has little effect on women. Fat soluble drugs such as anesthetics are used in larger doses in women than in men.

error 6: combing your hair 100 times a day is beneficial to health

excessive combing will stimulate the sebaceous glands on the scalp, especially those with oily hair. You should comb your hair less. If you have dry hair, it is suitable for combing your hair. However, it is best to use a comb made of natural mane, which is less likely to hurt the scalp.

error 7: walking consumes more energy than standing

because when standing, both legs have been bearing the weight of the body and both feet can’t relax. Walking is when one leg bears the weight and the other is relaxed.

error 8: people with sweet blood are easy to be bitten by mosquitoes

mosquitoes can’t smell blood at all. But mosquitoes are particularly sensitive to heat. They can even tell the difference of 0.05 degrees Celsius. Therefore, when we exhale carbon dioxide and water vapor, we will attract mosquitoes.

error 9: the toilet is a very unsanitary place

the toilet that is often washed with water is much cleaner than people’s stereotype. Family bacteria research experts found that most bacteria in the family hide in the drainage pipe on the inner wall of the refrigerator, and the amount of bacteria on the dishcloth is also more than that in the toilet.

error 10: the brain of a smart person is big

the size of the brain is not the key to determine whether you are smart or not, but the brain structure is the most important. The function of human brain is determined by neural network, and people with low IQ have died because some functions in this field, which has nothing to do with brain size. How about

? Are you surprised after reading it? It turns out that these little common sense that has been deeply rooted in our minds is wrong. Please correct it quickly to avoid causing greater harm.