<s>[INST] last night i started to feel some pain on the right side of my tongue , along the inside gums on the same side, and on the floor of the mouth same side connected to the gums. i am not sure what it is but it happened fairly quickly and i ve had steady discomfort and pain when i eat ever since. i do have a molar on the right side that has been decaying for quite some time, but i have not had it pulled due to lack of health benefits to make it affordable. if i apply pressure to the skin under the jaw bone i can feel pain inside which connects with the pain in the mouth. i would like to know how serious this is and how soon should i see a dentist? will doctors/nurses at a hospital be able to diagnose and/or treat it? [/INST] Hello & welcomes you said that there is a carious molar tooth on the same side you are feeling the symptoms this may be a periapical infection, and now this is spreading. So you have to immediately visit your dentist for further clinical investigation, otherwise this may lead in a serious space infection. Go for a check X-RAY, treatment will be either RCT/extraction.in the mean time you can start up with an antibiotic course including amoxicillin 500 mg TDS, metro 400 mg TDS and ibuprofen 400 mg (SOS)thanks & take care. </s>