Unless it becomes sticky, smells like rubber, or is no longer applied to your lips, you can safely use lipstick for at least eight months. Of course, if your lipstick comes in contact with a cold sore or other type of infection, kiss it goodbye. Finally we are going to cover the lips and nails. Nail polish lasts much longer than cosmetics and can last up to 2 years, unless you use it with a fungal infection.
If it is worn out and infection occurs, you should dispose of it immediately. Follow this same general rule if your makeup comes into contact with an infection, it should also be discarded immediately. As for lipstick, lip gloss and lip liner, they can last up to 2 years, if you don't use them first. Lipstick doesn't contain a lot of bacteria, so it can last between 12 and 18 months.
Although lipstick and gloss are packed with preservatives such as parabens, essential oils and vitamins to ward off germs, they start to break down naturally after a year. We know it's hard to throw away your favorite blush or lipstick, but meeting makeup expiration dates is actually really important.