I have pain on urination but cultures always show no uti. What are the next steps?

Cystitis/Urethritis? Interatitial cystitis, which is an inflammation of the lining of the bladder wall, or urethritis, inflammation of the urethral lining, can present with these symptoms and normal urine cultures. Next step is to see a urologist or uro-gynecologist for a possible cystoscopy where these areas can be directly visualized via fiber optic camera and more information gathered for treating your symptoms.