<s>[INST] hi, i woke this morning with sudden adbominal pain and joint pain. this is the last day of my period and I m 49. before my period last week I had similar joint pain but no nausea. I ve been un able to keep water down an have thrown up three times today with diarrhea. initially i thought the joint pain was from dehydration so i kept drinking but I just threw up. now i have pain on my left side under the rib (spleen?) and exhaustion. do you think this is food poisoning or could it be related to releasing a cyst or something? thanks for your information [/INST] HIIT points to gastritis sort of thing as stomach is situated this side. Cause could be from food related infection as you have both diarrhea and vomiting. A physician should be consulted, who may consider giving you anti emetics, anti microbes and advise on HY Chat Doctor. If fever and joint pains, can be some systemic viral infection cause also. Your history of illness and check up would help for treatment </s>