Bowel movements have no direct relation with urine flow. Diagnostic tools used to diagnose urethral stricture are retrograde urethrogram (injecting dye into urine tract and taking xray), uroflowmetry, micturating cystourethrogram.
Next Steps
Usually stricture needs repeated reviews with urologist and may require repeated manual dilatation.
Health Tips
Stick to reviews. Don't strain. If difficulty in passing urine, explain to urologist. Because prolonged straining can lead to many complications like hernia,
kidney dilatation etc