Kidney stones are the most likely cause of intense right groin pain, according to WebMD. Individuals with severe pain, fever, chills, nausea or vomiting should see a doctor immediately or go to a hospital emergency room.
Kidney stones are formed by waste in the urine that crystallizes into a hard mass. Extreme pain results from a stone that is stuck in the ureter, the tube that leads from the kidneys to the bladder. The stone blocks the flow of urine and causes the kidneys to swell, reports WebMD.
Small kidney stones may pass with little or no pain. These can be treated at home by taking over-the-counter pain medication and drinking lots of fluids to speed the passing. Larger stones that cause intense pain may require treatment at the hospital, says WebMD.
Individuals who present to the hospital emergency room with kidney stones may receive fluids, pain medication and anti-inflammatory medication intravenously. Stones that are too large to pass may be broken up into smaller pieces by a process called extracorporeal shock wave lithotripsy, states Web MD.
Kidney stones are not the only possible cause of intense right groin pain, according to WebMD. Evaluation by a medical professional may be necessary to determine the cause of pain.