<s>[INST] I have had a fluttering in my kidney region on the left side for the past day.  It is not painful.  I drink a lot of water throughout the day, work out five days a week, eat an extremely well-balanced meal, do not smoke or drink.  I have noticed the urge to urinate frequently which I thought was due to the large amounts of water I drink.  Please shed some light on what this fluttering can mean? The more it continues, it has made me more worried and concerned.  Thanks. [/INST] Hi, I can understand your concerns. Kidney conditions are not always very painful. Since an ultrasonogram is a very non-invasive, cheap but good diagnostic modality, I advise you to get an ultrasonogram of abdomen and check your urine microscopy. Any mild infection or mild obstruction in kidneys can cause your symptoms. Both these can be ruled out using the above said tests. I hope I have answered your query. Please feel free to get back to me if you need any further clarification or assistance. Wish you good health, Warm regards, </s>