Complications after lithotripsy are uncommon, but any medical procedure involves risk and potential complications. Complications may become serious in some cases. Complications can develop during the procedure or your recovery. Risks and potential complications of lithotripsy include: Adverse reaction or problems related to sedation, anesthesia or medications such as an allergic reaction and problems with breathing Bleeding around the kidney Bloody urine for a few days (common) Discomfort when stone fragments pass through the urinary tract. Your doctor may insert a stent to help reduce this complication. Infection Repeat need for lithotripsy due to large stone fragments Small risk of cancer due to radiation exposure. Your care team follows strict standards for X-ray techniques and will use the lowest amount of radiation possible to make the best images. Your doctor will generally not order an X-ray if you are pregnant due to the danger of radiation to an unborn child. Soreness, discomfort and bruising in the abdomen or back (common) Urinary tract obstruction from stone fragments Reducing your risk of complications You can reduce the risk of certain complications by: Following activity, dietary and lifestyle restrictions and recommendations before your procedure and during recovery. This usually includes not eating or drinking for several hours before your lithotripsy. Informing your doctor or radiologist if you are nursing or if there is any possibility of pregnancy Notifying your doctor immediately of any concerns such as fever, chills, or increase in pain Taking your medications and returning for follow-up care exactly as directed Telling all members of your care team if you have any allergies