I recently had a routine check in with my doctor and my renal function had deteriorated some eGFR54 and Creatinine of 141. My uric acid was 7.0. I have never experienced gout symtoms. My doctor put me on 100mg of Allopurinol to try to lower my uric acid and to try to reduce or slow down renal function loss. I am 59 and have had about 10 episdodes of kidney stones since age 17. All stones have passed naturally although I had lithotripsy in 1988 to try to break up a calcified area in the upper pole of one kidney. I have been on Allopurinol for 2 weeks and I am noticing some mild but noticeable tingling/pins and needles mostly in my hands/fingers and forearm but also a little bit in my legs and feet. The tingling is not major or particularly bothersome but it is noticeable. I do not seem to have any rash or swelling. Should I worry about the tingling or just monitor and see if it goes away or gets worse?