<s>[INST] Hello. I m an 18 year old female, about 145lbs, 5 6. My right side is hurting and I feel nauseous. It s more of the right side of my back and side. I used the bathroom maybe around 3pm and after is when I started feeling that way. I went again about 10 minutes ago and I still feel the same. Could this be something serious or will it be gone by tomorrow? [/INST] Hi. Thanks for your query. Read your history and understood it. The pain in the right side more of the back and right side can be due to following reasons::Impacted stone in the right upper ureter.Retrocecal meaning behind the cecum Appendicitis. This can be serious as the pain in the said area does not give classical signs and symptoms of a particular disease. High degree of suspicion only helps.I would advice you to go for the blood and urine test- RBS in urine will favor more for ureteric stone. Ultrasonography will see for both the problems, but CT scan will be more specific as it can diagnosed the suspected disease and rule out or diagnose any other problem. This may not go by tomorrow, get investigated , get a confirmed diagnosis as the treatment of both the problems is different and specific. </s>