Your skin loses strength and elasticity as you age, which can cause skin to sag and wrinkle. Mustard essential oil helps restore elasticity, tightens your skin and reduces the signs of aging, according to Valerie Ann Worwood, author of "The Complete Book of Essential Oils and Aromatherapy." Essential oils can irritate the skin so you must dilute them with another oil, known as a carrier oil. You can find mustard essential oil through online retailers.
Pour ¼ cup grapeseed oil into a small bowl. If you are using the oil on your face or if you have oily skin, use sesame oil.
Add 10 drops of mustard essential oil to the grapeseed oil. Swirl the bowl to mix the oils.
Massage the oil mixture into the areas of loose skin in the direction in which you want the skin to tighten. For example, if the skin on your breasts is sagging toward your belly button, you would massage upward in gentle, circular motions rather than massage in the direction in which the skin is sagging.
Cover the area with a towel. Skip this step if you are using the oil on your face.
Apply a heating pad, set to medium, to the area for 20 minutes. If you are using the oil on your face, dip the clean towel in hot water, wring until damp and apply it to your face.
Remove any residual oil with a cotton ball soaked in a mild astringent.