<s>[INST] hi i think i have an infection in one of my wisdom teeth, i think its called pericoronitis? my tooth has been impacted for quite some time but this is the worst it has ever felt as far as pain goes. i do not have insurance at this time to get it pulled or get antibiotics. what i need to know is what antibiotics are used for infections like this,and is there somewhere i can get them without the expensive trip to the doc and an outrageous bill for the help i need? [/INST] Hello and Welcome to Chat Doctor, Thanks for writing to us. The most common cause of pain from impacted tooth is the inflammation in the soft tissue covering over the offending tooth(Peritonitis), mostly caused by food impaction in the soft tissue space over the tooth and/or bite injury over the soft tissue covering the impacted tooth, by upper molar tooth. As your third molar has remote possibility to be erupted in the mouth(as cover by bone and no space to be erupted) the symptom like pain may frequently appear. The Third molar has no function for mastication(chewing) or maintaining occlusion, so it is always better to extract the tooth when it starts causing problem. In an experienced surgeons hand your impacted tooth can easily be extracted without causing much problem. Hope this helps you. Wishing you good health... Regards. </s>