Peppermint is preferable to spearmint as a medicinal herb because it contains menthol. But if you can't find peppermint or aren't sure which type of mint they have at the market, use whatever is available. Peppermint is easy to grow in most climates; consider growing your own supply.
Peppermint contains menthol which is a natural analgesic and anti-inflammatory
As an acne home remedy,
- Take a handful of mint leaves and crush them thoroughly with a mortar and pestle.
- Rub the leaves and juice on affected skin and leave for 5-10 minutes.
- Rinse with cold water.
- Repeat as often as desired to alleviate pain and inflammation.
source:
http://www.grannymed.com/remedies/conditions/acne/mint-for-acne
