My 4 years old son's lip is infected after my son (4 years old) went to the dentist he couldn't feel his lips because of anesthesia so he begin to bite and poke his lips and then it started to bleed. in the next day he woke up with a swelling lip. during

Sorry : Sorry about your problem and thanks for your picture. Posters don't often do that and we are left guessing as to what is going on. You son's lip was already inflammed from the biting, and his sister's foot added insult to injury. You assume it is infected, but that is hard to tell from the picture. An infection would involve bacterial infiltration... He just seems bruised. What do you give him if he has a fever or isn't feeling well? I cannot recommend what to use, but an otc children's medication for aches, pains, or fever should help with any pain and some of the swelling. Also putting a few ice cubes in a towel and intermittently placing the towel on and off the bruise should help with the swelling. Ask your 24 pharmacist at your local pharmacy to recommend the meds. See how he does overnight and take him to your pediatrician in the morning if things aren't any better. I don't think the er physicians would do much more for you at this hour.

Don't panic: Once the numbness resolves your son will stop biting his lip. The swelling is a normal reaction to trauma and will start to go down on its own. If you have concerns you can visit an urgent care center to have him checked out.

Will resolve: Hard to keep children from biting lip while it's numbed up. So now its bruised (probably not infected) and swollen. He needs an otc pain med and cold compresses on and off. In a day or so the swelling should start to resolve. Call your dentist to report the problem. He may want to see your son, but probably not. Treat this like any other severe bruise.