What is the general shelf life of lipstick?

What is the general shelf life of Lipstick? 

Girls always can't buy enough Cosmetic Matte Creamy Lipstick, they have to come in all kinds of colors, and they can't walk when they see the counter full of lipstick. Over time, the more Waterproof and Sweatproof Lipstick is saved on the hand, but there is only one mouth, and the shelf life of the Waterproof and Sweatproof Lipstick is about to pass in a blink of an eye. Many sister papers don't care if the Long Wear and Sweatproof Lipstick has a shelf life, so they keep using it. then What is the general shelf life of lipstick? Can I still use my lipstick after it has expired? 

The shelf life of Long Wear and Sweatproof Lipstick is generally around three years. Usually when you buy lipstick, you can see the shelf life of the lipstick on the packaging, and this shelf life often indicates how long the lipstick can be stored unopened. That is to say, if you open the lipstick, then the shelf life may not be as long as three years, because the oil and wax contained in the Long Wear and Sweatproof Lipstick are easier to absorb impurities such as dust, and once opened, its shelf life is more easily affected, so Cosmetic Matte Creamy Lipstick is recommended that the longest time of the opened Cosmetic Matte Creamy Lipstick can only be used for 18 months or two years.

Can I still use my lipstick after it has expired?
Some expired Waterproof and Sweatproof Lipstick still seem to be in good condition, so some people can't help but continue to use them. However, this is not advisable because the Waterproof and Sweatproof Lipstickwill add some chemical ingredients during the production process, and after the expiration date, these chemical components may deteriorate and may form harmful substances, and continued use may cause allergies and red, swollen and ulcerated lips. Therefore, it is recommended that everyone try to avoid using expired lipsticks.