<s>[INST] I had an mri an was told I had fluid in a sinus cavity. It s 2 weeks later, I had steroids and antibiotic, an have a horrible sinus infection. I also have pain in my gums above 1 front tooth, I woke up one morning with a real bitter taste in mouth. Is this all related? [/INST] HI, thanks for using Chat Doctor The pain in the mouth and the abnormal taste may be related to each other though there are other causes of abnormal tastes in the mouth. The pain in the mouth may be related to an infection in gums or teeth. This may cause abnormal taste. Abnormal taste in the mouth may also be linked to condition such as reflux disease. If the pain continues you should be evaluated by a dentist. I hope this helps </s>