Normally, the bladder gently fills with urine and you slowly become aware of the need to urinate. This feeling is your cue to start looking for a bathroom. But in people who have bladder spasms, the sensation occurs suddenly and often severely. A spasm itself is the sudden, involuntary squeezing of a muscle. A bladder spasm, or "detrusor contraction," occurs  when the bladder muscle squeezes suddenly without warning, causing an urgent need to release urine. The spasm can force urine from the bladder, causing leakage. When this happens, the condition is called urge incontinence or overactive bladder.

People who have had such spasms describe them as a cramping pain and sometimes as a burning sensation. Some women with severe bladder spasms compared the muscle contractions to severe menstrual cramps and even labor pains experienced during childbirth.

Main Symptoms of Urethral Spasm:
1. Pain and discomfort in the lower abdomen
2. A frequent urge to urinate
3. A feeling of pressure in the lower belly that doesn't go away after you urinate
4. Pain around the vulvar region
5. Pain with urination
6. Pain with sex