<s>[INST] My brother has several rotten teeth, his right jaw appeared swollen today and he has been feeling  ill for a long  time, He will not see a dentist fearing that his teeth will be extracted and he cannot afford dentures. he complains of a sore stomach and has no energy.Is this serious? [/INST] Thanks for using Chat Doctor. Read your query. Swelling and rotten teeth as you have described in your query suggests abscess in relation to the decayed teeth. All teeth decayed will not necessarily go for extraction, only after you get it checked you can have an idea on the treatment plan to be undergone. I would advise you to take your brother to the dentist for a check-up and get the decayed teeth filled or have root canal treatment done after having a radiograph done. For the pain, he can have ibuprofen (if he is not allergic to any medicines) and may also require antibiotics like amoxicillin after prescription from dentist. As there are decayed teeth, leading to inability to eat properly will also affect his food habits and will cause related digestive problems Do not apply hot bag externally. Hope this was helpful. Thanks and regards. </s>