The main chemical component in Wintergreen oil, methyl salicylate, is used in toothpaste, chewing gum, creams and massage blends. Wintergreen oil has a refreshing aroma, when diffused. It contains an aspirin that might relieve muscle pain, swelling, and fever. Wintergreen oil is used for headache, nerve pain , arthritis, ovarian pain and menstrual cramps. It is also used for digestion problems including stomachache and gas, lung conditions including asthma and inflammation.