Most people can return to their normal diet after lip fillers, but there are a few things to keep in mind. Avoiding hot drinks and spicy foods for the first 24 hours will help minimize any swelling. Drinking plenty of water is also important to help your body recover from the procedure. Chewing gum and eating hard or crunchy foods should also be avoided for at least 24 hours to prevent dislodging the filler. If you have any concerns, be sure to talk to your doctor or cosmetic surgeon.