Blood in the urine that is accompanied by abdominal pain may be caused by a variety of conditions, including cancer, kidney stones, obstructive uropathy, necrotizing vasculitis or a urinary tract infection, reports Healthline. A urinary tract infection, or UTI, is the most common cause of blood in the urine and abdominal pain and is typically caused by bacteria found in the urinary tract; however, there are 20 possible conditions listed as potential causes of these symptoms.
Some types of cancer that cause blood in the urine with abdominal pain include leukemia, Wilm's tumor, renal cell and bladder cancer, according to Healthline. Leukemia, a cancer of the blood cells, also causes symptoms such as fatigue, weight loss and bone pain. Wilms' tumor is the most common type of kidney cancer found in children, often accompanied by constipation, fever and a marked loss of appetite. Renal cell cancer or renal carcinoma is the most common kidney cancer found in adults.
Kidney stones, which are crystallized calcium found in the kidneys, can pass through a person's urinary tract, causing pain and bloody urine, explains Healthline. Obstructive uropathy is a condition that causes the flow of urine to be blocked and back up into a person's kidneys. Necrotizing vasculitis, which requires immediate medical attention, is an inflammation of the walls of a person's blood vessels. This leads to issues such as tissue and organ death and can affect any area of the body.