Hi and welcome to HCM. You need to treat uric acid disease first with Alopurinol and also reduce salt, calcium and purines in your diet which are present in fish and red meat. Most small stones in patients with relatively mild hydronephrosis can be treated with observation and acetaminophen. More serious cases with intractable pain may require drainage with a stent or percutaneous nephrostomy. Treatment of nephrolithiasis involves emergency management of renal (ureteral) colic, including surgical interventions where indicated, and medical therapy for stone disease. In emergency settings where concern exists about possible renal failure, the focus of treatment should be on correcting dehydration, treating urinary infections, preventing scarring and identifying patients with a solitary functional kidney. In your case these are moderate sized stones and I believe that it can be solved with conservative therapy without invasive procedures. Kindly regards. Wish you a good health.