Acne is a chronic, inflammatory skin condition that causes spots and pimples, especially on the face, shoulders, back, neck, chest, and upper arms. Whiteheads, blackheads, pimples, papules, pustules, cysts, and nodules are all types of acne.
It commonly occurs during puberty, when the sebaceous glands activate, but it can occur at any age. It is not dangerous, but it can leave skin scars. The glands produce oil and are stimulated by male hormones produced by the adrenal glands in both males and females. Treatment depends on how severe and persistent it is.
Risk factors include genetics, the menstrual cycle, anxiety and stress, hot and humid climates, using oil-based makeup, and squeezing pimples. Some other causes are:
- some medications that contain androgen and lithium
- greasy cosmetics
- hormonal changes
- emotional stress