Hair grows out half black and half yellow is mainly considered to be related to the influence of coloring agent, mental factors, disease factors and so on.
Dyeing agent influence: previous experience of hair coloring, hair still residual hair dye, with the continuous growth of hair, the phenomenon of half black and half yellow will occur.
Mental factors: long-term mental tension, excessive pressure, will have a certain impact on the endocrine system and the nervous system, inhibit melanin production and hair follicle blood supply, and then appear half yellow and half black hair symptoms.
Disease factors: such as hypothyroidism, severe anemia and other diseases, may lead to the body nutritional disorders, and thus the symptoms of half black and half yellow hair.
If the above symptoms occur, it is recommended to go to the hospital in time and follow the doctor’s instructions to be treated accordingly.