Also known as bladder pain syndrome
Diagnosis that applies to patients with chronic bladder pain in the absence of other explanatory etiologies
Frequently occurs in patients with other chronic pain syndromes such as fibromyalgia or irritable bowel syndrome
More common in women than in men
Most often diagnosed in 4th decade or later
Prevalence depends on study, ranging from:
197 per 100,000 women and 41 per 100,000 men 
Between 2.7 and 6.5% of women 
197 per 100,000 women and 41 per 100,000 men 
Between 2.7 and 6.5% of women
Interstitial cystitis
Bladder, urethral, or genital tract cancer
Acute cystitis
Urinary Tract Infection 
Pyelonephritis
STI
Prostatitis
Benign pelvic mass