Can a bladder infection cause abdominal pain?

YES, UTI=lower pain. Cystitis (bladder infection or uti) usually causes lower abdomen pain or 'spasms'. If the pain migrates to mid-back (one side) then a kidney infection is a possibility. You should get seen and be ready to provide a 'clean catch' urine sample. A bladder infection may also cause urine frequency, urgency, pain-burning with urinating, urine odor, cloudy urine. Hope you are better soon!