1, lack of calcium and other trace elements will lead to poor hair quality, bending and warping.
2, there are cases of self-curling or hard hair at home, which also causes bangs to bend easily.
3, often dye hair, perm, etc. , will cause damage to the hair, causing the hair to bend.
4, often staying up late, eating irregularly and other bad habits, will lead to malnutrition and bending of hair.