Reason: The occurrence of acne is closely related to factors such as excessive sebum secretion, blockage of sebaceous glands in hair follicles, bacterial infection and inflammatory reaction. After entering adolescence, the level of androgen, especially testosterone, rises rapidly, which promotes the development of sebaceous glands and produces a lot of sebum.

At the same time, the abnormal keratinization of sebaceous gland ducts in hair follicles causes duct blockage, sebum excretion disorder and keratin plug, that is, micro-acne. Many microorganisms, especially Propionibacterium acnes, proliferate in hair follicles. Lipase produced by Propionibacterium acne decomposes sebum to produce free fatty acids, and at the same time chemotaxis inflammatory cells and mediators, eventually inducing and aggravating inflammatory reactions.

Adolescent acne is also called whelk.

Extended data:

Performance:

Skin lesions often occur on the face and upper chest and back. The non-inflammatory disease of acne becomes open and closed acne. The typical lesions of closed acne (also known as baldness) are skin papules with the size of about 1 mm, and there is no obvious hair follicle opening.

Open acne (also known as blackhead acne) is characterized by dome-shaped papules and obvious enlargement of hair follicle openings. The further development of acne will evolve into various inflammatory lesions, showing inflammatory papules, pustules, nodules, cysts and so on.

The etiology is complex, usually related to the imbalance of estrogen/androgen ratio in the body. Irregular diet, excessively spicy food, excessive stress and staying up late will all promote the formation of acne.

Acne is more common in adolescence, but it is not completely limited by age. People of almost all ages, from babies to adults, can get sick. Acne usually occurs on the face, neck, chest and back, shoulders and upper arms. If the treatment is not timely or improper, it will cause a series of complications.

Prevention of acne:

The most important thing is to maintain a healthy lifestyle, such as adjusting eating habits, eating less spicy food, drinking more water and eating more fruits and vegetables; Work and rest regularly to avoid staying up late; Stay calm, etc. For women with makeup habits, pay attention to thoroughly removing makeup every night.

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