What skin disease is armpit black spot

Armpit black spots may be caused by melanin or endocrine disorders, but it cannot be ruled out as black thorn disease. It is recommended to go to the dermatology department for examination. If it is caused by endocrine disorders, it needs to be treated with hormone regulation drugs under the guidance of a doctor. At ordinary times, it is necessary to maintain local cleanliness and eat foods rich in vitamin C.