Wintergreen oil is an essential oil extracted from the leaves of the Gaultheria procumbens plant. Some synonyms for wintergreen oil include Gaultheria oil, tea oil, checkerberry oil, and mountain tea oil. It has a distinct aroma and is commonly used in aromatherapy and massage therapy. This oil contains an active ingredient called methyl salicylate, which is known for its anti-inflammatory and pain-relieving properties. Wintergreen oil has been traditionally used for treating various conditions such as muscle pain, rheumatism, and headaches. It is also useful in skincare products due to its antiseptic and astringent properties. Despite its benefits, wintergreen oil should be used with caution, as misuse can result in toxicity.