Topical application simply means to apply something to the external part of the body. Many topical applications of essential oils are used massage sore muscles or to sooth irritated skin. If your muscles are feeling extra sore after a long day at the gym, or maybe a change in the weather has your muscles cramping up, massage peppermint essential oil into the aching areas to relax and loosen up. The cooling qualities of peppermint will unwind hot and tense muscle areas. If your skin is feeling irritated from chafing or burning, apply chamomile essential oil to the affected areas to help calm and heal the irritation. Some essential oils are stronger than others, so make sure to carefully follow any directions before directly applying essential oil to the skin.