Frequent hair coloring can damage hair follicles, hair texture, scalp, and even internal organs and cancer. 1. Damage to hair follicles: If hair dye comes into contact with hair follicles, it may damage the hair follicles, cause inflammation or even shrinkage of hair follicles, which will lead to hair thinning and thickness, and finally even cause hair loss. 2. Damage to hair: hair coloring can denature a large number of proteins in the hair strands, making the hair brittle and lose its natural softness and luster, hair damage. 3. Damage to the scalp: If the scalp comes into contact with the hair dye, it may cause contact allergy, resulting in erythema and edema of the scalp, or even erosion, accompanied by obvious itching. 4. Damage to internal organs and cancer: if you dye your hair frequently, the hair dye will be absorbed into the body, and the heavy metal substances and ammonia in the hair dye can cause damage to the liver and kidney functions, and also affect the bone marrow hematopoiesis, and studies have shown that frequent dyeing of the hair will increase the risk of leukemia, lymphoma, kidney cancer and other tumors. So try to use regular hair dye, reduce the number of hair coloring to avoid adverse consequences.