Hi, welcome to our site. I am Dr Saumya Mittal. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query You have renal calculi. I would seriously suggest you meet a urologist. A 3 mm calculi is likely to move, and while it moves, it is going to cause pain. Outside of painkillers, take plenty of fluids. Some doctors prescribe diuretics. But that is subject to other medical conditions. Suggest to test kidney function tests, inclusive of uric acid. meet a dietician to know what you should not eat. i general, tomatoes are to be avoided I hope this helps you. Inform the reports mentioned above so i can be of help further. Best of luck. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)