<s>[INST] For the past few months I have been having an extreme toothache , I haven t slept in 30 hours because it s just that bad. I also have a headache that I think is related to it because all of the pain is on the left side of my face. It hurts for me to open my eyes wide and I was wondering if it is neurological or do I just need to go to the dentist? [/INST] Hi and welcome, toothache arises from inflammation of the tooth nerve tissue by bacterial carious process or some kind of periodontal infection. Dental pain has radiating nature, and it does radio to the surrounding structures like head, neck, and ear region. I would suggest you to visit a dentist and get an OPG radiograph done which will show the infection areas and the vital structures involved.  Accordingly treatment can be planned, infection in the tooth is treated by root canal procedure followed by a course of antibiotics and analgesics will subside the symptoms.  Meantime you can use analgesics like diclofenac with serrtiopeptidase which helps in relieving excruciating dental pain. I hope this helps, take care. </s>