Old pimples, i.e. acne, has been associated with heredity, androgen-induced sebum secretion, keratinization of follicular sebaceous gland ducts, Propionibacterium acnes, etc. and other related factors.
1. Heredity: The occurrence of acne can have certain genetic factors.
2. Androgens: Increased levels of androgens can cause enlarged sebaceous glands and large amounts of sebum secretion.
2. Propionibacterium acnes: Excessive sebum secretion provides a favorable environment for the growth and reproduction of Propionibacterium acnes. Propionibacterium acnes can stimulate hair follicles, causing obstruction of sebum discharge and formation of acne.
3. Immuno-inflammatory reaction: some low molecules secreted by Propionibacterium acnes can cause an immune reaction at the lesions, resulting in damage to the follicle wall.
4. Keratinization of follicular sebaceous gland ducts: Abnormal keratinization of follicular sebaceous gland ducts can cause obstruction of sebum and sweat discharge, resulting in acne.
5. Other related factors: Anxiety, stress and other emotions, eating spicy and stimulating foods and endocrine disorders can also induce acne.
If you feel uncomfortable, it is recommended that you consult a doctor in time for diagnosis and treatment.