There are two main types of dandruff: one is the oil secreted by the scalp, and the other is the overgrowth of fungi. First of all, it is a normal physiological phenomenon for oil glands to secrete oil. Of course, everyone's hair quality is different, the surrounding environment is different, and the diet and Xi habits are different, which will lead to different degrees of oily hair and dandruff mixed together: excessive oil secretion, serious bacterial growth, and accompanied by dandruff breeding, scalp redness, swelling, itching, etc. So, don't underestimate these scalp problems
Hair is an important embodiment of a person's personal image, hair quality and cleanliness is an aspect that many people are very close to, if you want to buy high-quality shampoo for hair, it is very important. Now there are so many brands of shampoos, what brand of shampoo is good?And how to buy high-quality ones?The criteria for judging whether a shampoo is good or bad
1 Look at the mildness of the product
The mildness of the shampoo is the pH of the shampoo. Normal hair is weakly acidic, if the pH of the shampoo is higher than the hair, then the pH of the hair will increase after washing, at this time, the epidermal hair cuticle will open, and the hair will be the most fragile and easily damaged.
Therefore, it is important to use an acidic shampoo to balance the pH of the two, so that the scales of the hair will be closed, and the hair will be naturally smooth and combable, healthy and soft.
2 The foaming power of the shampoo
Foaming power is an important indicator to distinguish the quality of shampoo, in general, a good shampoo is good to lather, with a small amount of water can make a lot of foam. At a certain temperature, we stir the sample diluent directly with a glass rod for 3 minutes, and then introduce the sample into the graduated cylinder, and the foam height can be directly read, the larger the foam height, the better the foaming power of the product3 Look at the detergency of the productThe decontamination ability is an important indicator of the quality of a shampoo, and the most basic function of a shampoo is to clean. It removes excess oil and dirt from the scalp and creates a good environment for hair to grow.
In professional hair shampoo products, shampoos are designed to help open the cuticle for a more thorough cleanse, while also helping to close the cuticle4 Look at the restorative power of the productDyeing, perming and straightening hair can damage the epidermal cuticle, which arches if damaged.
If you use a restorative shampoo, you may want to pick up a microscope and see if there is any noticeable arch in the washed hair, and if not, the repair effect is good.
The right steps for hair care1. Close contact with the comb:The first thing to do is to pick a good comb. A correct comb will not only protect your hair, but also refresh your mind and prolong your life, while a wrong comb will not only scratch your scalp but also damage the quality of your hair. 
Slowly comb through the ends and then from the roots to the ends.
Tip: Smooth hair and improve blood circulation2. Play games with bubbles:
After completely soaking your hair with lukewarm water, pour an appropriate amount of shampoo into the palm of your hand, rub the shampoo into a lather in the palm of your hand, and play with the bubbles on your scalp and hair
Tip: Pouring shampoo directly onto your scalp can hurt your scalp and won't wash off easily3. Finger gymnastics:When shampooing, you should massage your fingertips back and forth on your scalp in a circular motion to promote blood circulation to the scalp and remove keratin and oil. 
Tip: Nail scratching can hurt your scalp. The effectiveness of shampoo is best when the water is lukewarm, the water is too hot and will dry out the hair, and the water is too cold for the hair to be thoroughly rinsed4. Dry hair cheats:
Use two towels to dry your hair, the first to absorb most of the water and the second to dry your hair. Gently wrap your hair with a towel or press until no more water droplets drip down, and when your hair is dry, remember to comb your hair and massage your scalp to soothe your scalp.
Tip: It's best to let your hair air dry naturally when you have time. Use a hair dryer to dry your hair, keeping it as far away from your hair as possible and shaking it slightly. When it is dry, it is best to give your hair plenty of rest space to have beautiful hair, and the focus is on care, so please don't neglect the simple care steps