8. Apply Natural Plumpers
Menthol is a natural plumping agent, but so are clove oil, niacin, cinnamon, and honey. Any of these can be safely applied to your lips multiple times per day.
Niacin is probably the easiest to use because it comes in liquid form and can be carried about in a small bottle. If you use cinnamon and honey, you’ll smell great and taste sweet.