Catecholamines are neurotransmitters that are ineffective against vitiligo, and increased catecholamines are associated with the development of vitiligo. Vitiligo is caused by the loss of melanocyte function of the skin, belongs to the pigmented skin disease, manifested as appearing in any part of the nearly round, oval and irregular shape, the boundaries of the skin white spots or white hair is very obvious. Catecholamines, which mainly include dopamine, norepinephrine and epinephrine, consume large amounts of tyrosine in the synthesis of these substances, thus competing with melanin synthesis. If the synthesis of catecholamines is significantly increased, tyrosine is directed to norepinephrine and epinephrine, which inhibits melanin synthesis, leading to melanin deficiency triggering vitiligo. If you have vitiligo, you should go to the hospital in time, under the guidance of the doctor can test the body of catecholamine content, timely treatment.