1. Symptoms
   1. Whiteheads
   2. Blackheads
   3. Small red, tender bumps
   4. Pimples
   5. Large, solid lumps under the skin
   6. Painful, pus-filled lumps under the skin
2. Causes
   1. Excess oil production
   2. Hair follicles clogged by oil and dead skin cells
   3. Bacteria
   4. Inflammation
3. Myths - Factors having little effect on acne
   1. Chocolate and greasy foods
   2. Hygiene
      1. *scrubbing/cleansing too hard irritates the skin and make acne worse
   3. Cosmetics
      1. especially the oil-free makeup
4. https://www.mayoclinic.org/diseases-conditions/acne/symptoms-causes/syc-20368047