What are the causes of acne?

1, hormones: acne usually begins in adolescence, when the body begins to secrete hormones.11/4 years old is the climax of male hormone secretion, so it is also the climax of acne.

2, sebum secretion is strong: sebaceous glands are stimulated by androgen and will produce more sebum. But greasy sebum, mixed with normal exfoliated old keratin, accumulates in hair follicles. The more exuberant sebaceous glands are, the more easily hair follicles are blocked and acne is formed.

3. Changes in hair follicles: With the increase of male hormones, sebum secretion is strong, hair follicles will change, and normal dead keratin will gradually be discharged. But the old horniness in adolescence will soon fall off and stick together, and then mix sebum to block hair follicles.

4. Heredity: Men and women of any race will get acne, but there are still some differences. For example, whites are more likely to get acne than blacks and Asians. Although everyone will get acne, some cases of acne will be similar to other family members.

5. Cosmetics: Some specific cosmetic ingredients can cause pore blockage and cause acne. These products include cosmetics, foundation, night cream and moisturizing cream.

6. Acne Bacillus: Blocked hair follicles are easy to breed bacteria. One of them is called Acne Bacillus, which lives on sebum and normally exists in the skin. When sebum blocks hair follicles, Acne bacilli multiply rapidly, and the chemicals they produce will inflame hair follicles and their surroundings.