There are often some annoying things in life, such as dandruff and greasy hair. At this time, as long as you don't wash your hair for a day, there will be dandruff sticking to your scalp, just like a piece of small snowflakes, which will affect your image very much, and in severe cases, there will be scalp itching, which makes friends who encounter this kind of situation very depressed. What should we do at this point?
What's the deal with a lot of dandruff and oily scalp?
There are two main causes of increased dandruff, one is caused by a cracked scalp, which generally occurs in places with severe sandstorms in northern regions, and the other is due to dandruff caused by fungi, and most dandruff is caused by this reason.
Malassezia is a fungus that causes dandruff and feeds on the oil secreted by the scalp, mainly in areas where the sebaceous glands are densely distributed, such as the face and scalp. If the oil secretion is relatively strong, a large number of Malassezia will multiply on the surface of the scalp, especially in people with a lot of dandruff. When Malassezia breaks down oil and provides nutrients for it, it produces oleic acid, which in turn induces an inflammatory response and produces a large amount of dandruff, which makes the scalp itchy and hair follicles inflamed. It can be seen that the growth of a large number of bacteria is the main cause of dandruff. 
How to take care of your scalp?
Don't sleep with wet hair, because too much water is trapped on the surface of the scalp, the scalp is moist and not breathable, this environment is suitable for microbial growth and reproduction, causing dandruff to get worse and worse, so you need to dry your hair before going to bed.
Failure to pay attention to pillow towel and pillow hygiene can breed too many bacteria and mites, which can easily cause a variety of problems, such as scalp dermatitis and acne. In addition to washing your scalp regularly, change your pillows and pillows at least once every two weeks and expose them to the sun after washing. 
Try to wear a hat when you go out to reduce the damage caused by UV rays to your scalp. If the scalp is damaged by ultraviolet rays for a long time, it can accelerate the rate of hair loss, causing the scalp to sagge and age. Prefer a horn comb or wooden comb to promote local blood circulation and help remove dandruff. Although plastic combs are cheap, they tend to generate static electricity, which can absorb dirt around them and damage the scalp and hair.
Tips
These methods can be used to alleviate dandruff and reduce the number of perms and hair coloring, as perms and dyes contain certain chemical ingredients that can damage the scalp and hair. In addition, you should adjust the rhythm of life, reduce stress in time, pay more attention to rest, and maintain a happy mood.