Causes of abdominal pain with back pain include pancreatic cancer, urinary tract infection and gallstones, according to Mayo Clinic, MedicineNet and WebMD. In pancreatic cancer, the pain begins in the upper abdomen and radiates to the back, notes Mayo Clinic.
The patient may also experience jaundice, unexplained loss of weight and appetite, blood clots and depression, says Mayo Clinic.
A urinary tract infection involves the kidneys, the ureters, which are tubes that lead from the kidneys to the urinary bladder, the bladder itself and the urethra, which discharges urine from the body, says MedicineNet. The symptoms are somewhat different for a patient who has lower urinary tract infection than for a patient who has an upper urinary tract infection. In a lower urinary tract infection, the patient feels pain in the lower abdomen. In an upper urinary tract infection, the patient also feels pain in the back or the side at waist level and might also feel pain in the lower abdomen.
Gallstones are found in the gallbladder and are made either of cholesterol or bilirubin, says WebMD. They often don't cause problems until they block the bile ducts. The symptoms include pain in the upper abdomen and upper back that lasts for hours, nausea, vomiting, and other discomfort such as indigestion, gas and heartburn.