A nevus is medically known as a pigmented nevus and is usually associated with heredity, genetic mutation, external environment, medication, trauma, and endocrine factors.
Pigmented nevi appear in early childhood and peak in adolescence. Part of it may be related to in situ gene mutation during embryonic development. Ultraviolet radiation is also an important cause of nevus pigmentosus. Frequent exposure to the outdoors without proper sun protection will also lead to an increase in nevus pigmentosus on the face. Staying up late and having an irregular lifestyle can also lead to an increase in the number of nevi.
Pigmented nevus can occur at any age, acquired pigmented nevus occurs in childhood or adolescence, clear border, uniform color, can be brown, brown, blue-black, dark red, etc., usually more than a few. And congenital nevi are present at birth and often multiple.
For acquired nevus, generally no treatment is needed. Some patients have cosmetic needs, and an individualized treatment plan can be formulated based on a comprehensive analysis of size, location, depth, and whether it is raised. Congenital patients have a higher possibility of malignant transformation, and those suspected of malignant transformation should be surgically removed as early as possible.
If there is any discomfort, it is necessary to improve the relevant examination under the guidance of the doctor to clarify the diagnosis, and need to standardize the treatment, so as not to delay the condition.