Obstructive causes<unk> 
Prostate cancer
Blood clot
Urethral Stricture
Bladder Calculi
Bladder neoplasm
Foreign body, urethral or bladder
Ovarian/uterine tumor
Incarcerated uterus
Neurogenic causes
Multiple sclerosis
Parkinson's
Brain tumor
Cerebral vascular disease
Cauda equina syndrome
Spinal cord compression (non-traumatic)
Intervertebral disk herniation
Neuropathy
Nerve injury from pelvic surgery
Postoperative retention
Trauma
Urethral injury
Bladder injury
Spinal cord injury
Extraurinary causes
Perirectal or pelvic abscesses
Rectal or retroperitoneal masses
Fecal impaction
Abdominal Aortic Aneurysm
Psychogenic causes
Psychosexual stress
Acute anxiety
Infection
Cystitis<unk> is
Herpes Simplex (genital)
Herpes Zoster involving pelvic region
Local Abscess
PID
Meds
Anticholinergics
Antihistamines
Cold meds
Sympathomimetics
TCA
Muscle relaxants
Opioids<unk> 
Prostate cancer
Blood clot
Urethral Stricture
Bladder Calculi
Bladder neoplasm
Foreign body, urethral or bladder
Ovarian/uterine tumor
Incarcerated uterus
Multiple sclerosis
Parkinson's
Brain tumor
Cerebral vascular disease
Cauda equina syndrome
Spinal cord compression (non-traumatic)
Intervertebral disk herniation
Neuropathy
Nerve injury from pelvic surgery
Postoperative retention
Urethral injury
Bladder injury
Spinal cord injury
Perirectal or pelvic abscesses
Rectal or retroperitoneal masses
Fecal impaction
Abdominal Aortic Aneurysm
Psychosexual stress
Acute anxiety
Cystitis<unk> is
Herpes Simplex (genital)
Herpes Zoster involving pelvic region
Local Abscess
PID
Anticholinergics
Antihistamines
Cold meds
Sympathomimetics
TCA
Muscle relaxants
Opioids
Benign prostatic hyperplasia
Obstructive causes
Interstitial cystitis
BPH
Acute cystitis
Prostate cancer
Pelvic organ prolapse
Blood clot