Pimples form when the following occur at the same time:
- Excess sebum production – too much sebum is produced by the sebaceous gland
- Hyperkeratinization – The hair follicle cells get clogged so the sebum can’t escape
- Cutibacterium acnes – this bacteria is normally found in the skin begins to over grow
- Inflammation – this is when the immune system begins to be react to the hair follicle which is clogged, has a build up of sebum, and a build up of bacteria.