Abdomen pain after urinary tract infection healed. got cystoscope everything looked normal just mild bladder irritation? what could be cause of pain?

Not fully healed: You may have prolonged bladder symptoms after a bout of cystitis. If the bladder pain is still present 6 months after the infection, you might have interstitial cystitis, an inflammatory disease of the bladder. There could also be a non-urologic cause of the pain.

Urinary infection: The abdominal pain maybe a symptom of another uti. Have a urine culture repeated and if it shows another uti, you do not need another cystoscopy (i wonder why it was done in the first place). Instead have an ultrasound of the kidneys, ureters and bladder. Another factor to investigate is whether you are chronically constipated as this condition is often associated with repeated uti.