Acne vulgaris involves-
Acne vulgaris is a disorder of sebaceous glands. Acne vulgaris is a skin condition that occurs when hair follicles are blocked with dead skin cells, bacteria, and oil (sebum). ... Causes Hormonal changes in pregnancy or from the menstrual cycle. Some medications. Ceain cosmetics and lotions. High humidity and sweating. Polycystic ovary syndrome (PCOS) Ref Harrison20th edition pg 1234
Sweat glands
Sebaceous gland
Hair follicles
Ceruminous glands
Anatomy of skin