Dermal spot is not a medical term, it is a general term for dermal skin pigmentation spots, including chloasma, nevus of Ota, etc. The cause of its formation is mainly due to the skin pigmentation in the dermis layer of the skin under the stimulation of heredity and various external factors. The causes of different types of dermal spots are different.
1. Melasma: Melasma is associated with hereditary factors, ultraviolet irradiation, changes in sex hormone levels and other factors, resulting in yellowish-brown hyperpigmentation spots on the face.
2. Nevus of Ota: the etiology and pathogenesis of this disease are unknown, and may be related to genetic factors. The presence of estrogen, progesterone and androgen receptors in the dermal melanocytes of some patients is related to the occurrence and aggravation of nevus of Ota in puberty.
Generally after the appearance of dermal spots, it can be improved by laser treatment to remove or reduce the color spots. It is recommended that patients can go to regular hospitals for treatment if it affects their aesthetics according to their own situation.