Symptom: Inability to Urinate

    When you cannot empty your bladder completely, or at all, despite an urge to urinate, you have urinary retention. To understand how urinary retention occurs, it is important to understand the basics of how urine is stored in and released from the body. The bladder is a balloon-like organ in the lower part of the belly (pelvis) that stores urine.
  • Urine is composed of waste and water filtered from the blood by the kidneys.
  • It travels down two thin tubes called ureters (one from each kidney) to the bladder.
  • When about 1 cup (200 ml-300 ml) of urine has collected in the bladder, a signal is produced in response to the stretch of the bladder from the nerves located in the bladder wall. This signal is sent to the nerves in the spinal cord and the brain, and the brain then returns a signal that starts contractions in the bladder wall. At the same time, another signal is sent to the internal sphincter muscle to relax.
  • These two reactions combined allow urine to flow out of the bladder and down a narrow tube called the urethra.
  • From there, it is released from the body by urination (or micturition).
  • To a certain point, urination can be voluntarily controlled. We are all familiar with the experience of having to urinate at an inconvenient time. When you "hold it in," you are squeezing a muscle called the external sphincter to keep urine in the urethra.
  • Urinary retention can be an acute (new, short-term) or chronic (ongoing, long-term) condition. It routinely requires medical attention, sometimes hospitalization, for treatment, symptom relief, and detection of the underlying cause. Failure to treat the condition can lead to infections or damage to the urinary tract and kidneys. Urinary retention is not an unusual condition, and it is more common in men than in women.

    Source: http://www.emedicinehealth.com

    1 23...Next»(Page 1 of 12)GlossaryInability to Urinate Topic Guide Must Read Articles Related to Inability to Urinate Dysuria Dysuria is the sensation of pain during urination and may be caused by a std or infection of the bladder, kidney, urethra, or prostate. A urinalysis will be per...learn more >> Enlarged Prostate A man's prostate gland usually starts to enlarge after he reaches age 40 years or middle age. This condition is called benign prostatic hyperplasia (BPH). The p...learn more >> Fever in Adults A fever is a body temperature of 100.4 F or greater. A fever may be caused by a virus, bacteria, fungus, blood clot, tumor, drug, or the environment. Treatment ...learn more >> See the Entire Inability to Urinate Topic Guide » Patient Comments & Reviews The eMedicineHealth doctors ask about Inability to Urinate: Inability to Urinate - Causes What was causing your inability to urinate? 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