If you suddenly experience a dull ache or pain in your sides or abdomen, you may think you have a bad stomachache or intestinal virus. However, you may actually have a bad infection in your kidneys (pyelonephritis). Back pain isn't the only symptom kidney infections produce. The infections can also cause pain in your sides (or flanks), midsection, groin area, and lower back region. You may also experience a host of other problems that indicate an infection.
6 June 2018