Blood in the urine and back pain can be caused by kidney stones, according to WebMD. The symptoms can also be caused by kidney infections, such as pyelonephritis. Kidney cancer can also be a cause of pain in the back accompanied by blood in the urine.
Prostate cancer can also cause blood in the urine as well as back pain, according to the Prostate Cancer Foundation.
Pyelonephritis is a type of infection that begins in the bladder or the urethra, according to Mayo Clinic. It can be acute or chronic but needs to be treated in a timely manner. If it isn't, it can permanently damage the kidneys and even cause life-threatening sepsis. Fortunately, kidney infection can be successfully treated with antibiotics.
Kidney stones are made up of mineral salts, including cholesterol, according to Mayo Clinic. They are usually silent until they start to press against the tube that leads from the kidney into the bladder. Besides occasionally severe back pain and blood in the urine, symptoms can include nausea and vomiting.
Sometimes, the blood in the urine can only be detectable by examination under a microscope, as WebMD explains. In other cases, the blood in the urine might be plainly seen or the urine can be reddish brown, pink or the color of dark tea.