Causes of pain in the flank include dehydration, muscle spasm, kidney stones and infections in the spine, details Healthline. Flank pain is the pain in the back, upper abdomen and on sides, which worsens on one side of the body. Abdominal growth, constipation, stomach flu and kidney infections can cause abdominal pain. Causes of back pain include disc degeneration, spine injuries and vertebrae infection, according to WebMD.
Flank pain is usually a short-lived condition and is a typical sign of kidney problems, notes Healthline. Patients with symptoms of dehydration such as extreme thirst, headache, sticky mouth and decreased urine output should seek immediate medical care. Diagnosis for flank pain includes tests such as computed tomography scan, urinalysis, cystoscopy and urine culture.
Infections in the intestines, throat and blood can cause bacteria to enter the digestive tract, causing changes in digestion, which can lead to abdominal pain, says Healthline. Conditions that affect the digestive system such as irritable bowel syndrome, the inability of the body to digest lactose and gastroesophageal reflux disease can cause chronic abdominal pain.
Twisting or improper lifting can result in fractures and tears in the ligaments supporting the spine, causing back pain, according to WebMD. Fractured vertebrae mainly result from osteoporosis, which weakens bones. Infections and tumors can also cause back pain, especially when the condition involves the vertebrae or discs that cushion the vertebrae.