Etiology

Adolescents (Puberty) ****- Puberty hormone, resolves by late 20s
Hormonal - Distribute along bilateral jaw lines, persist to adulthood
- POCS, women in 20s
“Neonatal” - not a true acne, caused by yeast infection (Malassezia)
Infantile - 3-6 m
Acne Vulgaris - a chronic inflammatory disease of the pilosebaceous unit
Acne Conglobata - follicular occlusion

Follicular Occulsion Tetraed
Medication-induced
- Steroid (cortical, anabolic)
  - Oral Corticosteroid (OCS)
- Lithium (0.8-1.2 mmol/L)
- Phenytoin
- EGFR TKi
- JAKi
Acne Cosmetica - cosmetic product, around hairline
Acne Mechanica - pressure, bra line and shoulder

Relevant Physiology