Error 1: A wise man has a big brain. The size of the brain is not the key to determine whether they are smart or not, but the structure of the brain is the most important. The function of human brain is determined by neural network, and people with low IQ die because of some functions in this area, regardless of the size of the brain.

Mistake 2: Comb your hair 100 times a day is good for your health. Comb your hair too much will stimulate sebaceous glands on your scalp, especially oily hair. Comb your hair less. If it is long and dry, it is more suitable for combing hair. However, it is best to use a comb with natural bristles, which is less likely to hurt the scalp.

Mistake 3: Brush your teeth immediately after meals. Brushing your teeth immediately after eating will make the acid in food erode the enamel, which will only strengthen the destructive effect of acid in food on teeth. The correct way is to rinse your mouth first and brush your teeth after half an hour.