How do tinea versicolor form? The reasons are these

Pityriasis versicolor is also known as tinea versicolor, which is a common skin disease in clinical practice. There are many causes of tinea versicolor, and some people do not understand how tinea versicolor is formed. Generally speaking, the formation of tinea versicolor is closely related to infection, which requires improvement and conditioning in many aspects.

1. Ultraviolet radiation: In order to block UVB, the basement membrane of the epidermis produces melanin to protect the skin, resulting in spots on the skin. When metabolism is normal, melanin will be peeled off with the skin's renewal process; but when metabolism is blocked or the damage from ultraviolet rays is too great, melanin cannot be completely excreted and instead precipitates to form spots. Pityriasis versicolor is lipophilic, so the skin lesions are mostly distributed in areas rich in sebaceous glands. Pityriasis versicolor fungi can produce dihydroxy acids that have inhibitory and cytotoxic effects on melanocytes, causing pityriasis versicolor lesions to appear hypopigmented. Some people also believe that this is because the pityriasis versicolor fungus and its metabolites can prevent sunlight from penetrating the local skin and interfere with the formation of local skin melanin.

2. Hormone secretion: About two weeks after ovulation and before menstruation, a woman's body will secrete a large amount of corpus luteum. The secretion of the corpus luteum and the hormone that orders the production of melanin come from the pituitary gland. Therefore, when the corpus luteum increases, the melanin will also increase, making it easier to develop dark spots than usual.

3. Incorrect skin care methods: rubbing too hard when applying foundation, washing face, scrubbing, and applying skin care products will damage the skin, stimulate pigmentation and cause dark spots. Using improper skin care products may cause skin allergies and inflammation, leading to pigmentation and dark spots.