1. Straight hair can grow a lot immediately, but it won't grow for a long time after that, because straight hair stretches and straightens the hair, which has destroyed the hair follicle.

2. Wash your hair more to stimulate hair follicles.

3. Tie up your hair. The principle is the same as that of 1, except that straight hair is a one-time extension of hair, while tying hair is a gradual extension of hair, which does little harm to hair follicles.

Diet is very important. Eat more protein, including fish, eggs, beans, yogurt, beef liver and so on. Take vitamins in time.

In addition, cut off the bifurcated hair in time to let healthy hair grow out.

Make sure you have a rest. It is right for people to leave their hair idle and grow it.

Don't wash your hair with too hot water, and don't blow your hair.

Maintain your hair regularly.

Don't smoke and drink.

However, it is impossible to grow hair overnight unless you lengthen it.