There is no clear medical rule on how long to eat after applying lip balm, it is generally not recommended to eat immediately, you can eat after half an hour to an hour of lip balm being absorbed by the lip skin, how long the specific interval needs to be decided according to the absorption of the skin of the lip area and the amount of lip balm applied and other factors. Lip balm is one of the more common ways to protect the skin of the lips, which can make the skin hydrated and smooth. The main ingredients of lip balm are oil, petroleum jelly and wax, which can play a role in moisturizing the skin and relieving dry skin. When the lips are dry or the skin of the lip area is thin, lip balm can generally be absorbed by the skin quickly after proper application to achieve the effect of moisturizing the lips. Usually after half an hour you can eat normally, you can use a tissue to wipe your lips before eating to see if there is residual lip balm. The skin of the lip area is slow to absorb, or itself does not lack of water, as well as apply lip balm more, after applying lip balm may stay in the lip area for a longer time, usually after an hour before it can be gradually absorbed by the skin, then you need to extend the time of eating. In addition, there will be some oily substances in the lip area after applying lip balm, so you need to do a good job of protecting the lip area and not to go to the dust-polluted environment to avoid dust or other microorganisms from sticking to the lip balm and entering the mouth during the eating process. To ensure dietary hygiene, it is recommended to wipe the lips with a tissue before eating.