Dyeing your hair is harmful to your health. It is not recommended to dye your hair too often. It is advisable to dye your hair 1~2 times a year. Hair dyeing has the following hazards to the body: First, it may cause scalp allergy, little red dot, and in severe cases, folliculitis. Second, harmful substances in hair dyes can cause cancer, because most hair dyes are chemical components, which have a strong stimulating effect on hair. Regular use will lead to dull hair, lack of nutrition, hair loss and dandruff increase after a long time. Third, heavy metals in hair dyes exceed the standard. If the hair dye penetrates into the skin and enters the blood, the body will absorb harmful substances. Long-term use will damage liver and kidney function and cause leukemia, various cancers and other diseases. If you dye your hair occasionally, no more than twice a year, it is usually harmless to your health. However, if you often dye your hair, because it contains toxic chemicals, it will do harm to your body, as shown below:
1. Damage to hair follicles and hair quality: If it comes into contact with hair follicles, it will damage hair follicles, resulting in dry and dull hair, which will also affect growth;
2, damage to the scalp: if the scalp is exposed to hair dye, it may cause contact allergy, manifested as scalp erythema, edema, and even erosion and exudation, accompanied by obvious itching;
3, visceral injury, cancer: long-term hair dye can be absorbed into the body, including heavy metal substances, ammonia substances and so on. , can cause liver and kidney function damage, but also affect bone marrow hematopoietic cells. According to research, long-term frequent hair dyeing will increase the risk of leukemia, lymphoma, kidney cancer, bladder cancer and other tumors.