What affects the appearance can be removed by laser treatment, but some people may relapse and some people will not. The key is to look at people's skin adaptability. The reason of recurrence is that the disease is hereditary skin disease, and its pathogenesis is still unclear. It can be the manifestation of many systemic diseases, such as neurofibromatosis, tuberous sclerosis, multiple sunspot syndrome and ataxia telangiectasia.

Extended data:

1. There are coffee spots on my face, ranging from the tip of a needle to the size of a millet. Skin pathology showed that the number of melanocytes in the basal layer did not increase, and there were deep spots or papules and nodules on the brown spots.

2. Coffee spot is a common pigmented skin disease. 10% ~ 20% of normal people can see a single coffee spot at birth. The depth is not affected by sunlight, ranging from a few millimeters to dozens of centimeters, with clear boundaries and completely normal skin texture on the surface. Generally, this kind of skin disease can be diagnosed according to the clinical characteristics of skin lesions.

References:

Baidu encyclopedia-coffee point