Ureteric stones are usually symptomatic and may cause significant obstruction. Get urine examination routine and microscopic also to detect any associated infection along with a functional study like IVP or CT Urography  to know degree of obstruction caused by stones. Medical expulsive therapy may benefit a lot number of patients but not everybody. oxalates & uric acid restricted diet is useful.urinary stones inhibitors like mixture of potassium magnesium citrate mixed with glass of water thrice daily in doses of 15 ml every time help in treatment.consult a urologist for detailed prescription