I am a 27 years old female. Till now i had five bouts of acute retention of urine.After catheterisation I am fine, no urine symptoms in between these attacks. My urologist has checked and investigated me thoroughly [ivp,usg,cystoscopy] ,everything is normal. No residual urine or straining or incontinence in between.NO medication. I had caeserian followed by infection five years back.Please guide.