The second type: clip yourself in a household splint several times.
The third type: If you want bangs to be straight, you can ask the barber to soften the bangs first and then set them.
Fourth, you can buy a hair straightener to soften and comb straight, and then pay attention to the method of washing your hair. The water temperature should not be too hot. Use warm water, shampoo and conditioner separately. Don't buy a two-in-one product. Always use conditioner every time you wash your hair, then eat more nuts, such as walnuts, black sesame seeds and almonds, and massage your scalp more.
Fifth: If you want to smooth natural curly hair, you can spray glue on a fine-toothed comb or a clean toothbrush and comb it down from the hairline, so as to keep your hair straight.
If you have other questions, you can ask me.