<unk>  is a common disorder in elderly males. The most common cause of<unk>  is BPH. This disorder starts around age 50 and symptoms may appear after 10–15 years. BPH is a progressive disorder and narrows the neck of the bladder leading to<unk> . By the age of 70, almost 10 percent of males have some degree of BPH and 33% have it by the eighth decade of life. While BPH rarely causes sudden<unk> , the condition can become acute in the presence of certain medications including antihypertensives, antihistamines, and antiparkinson medications, and after spinal anaesthesia or stroke. In young males, the most common cause of<unk>  is infection of the prostate (acute prostatitis). The infection is acquired during sexual intercourse and presents with low back pain, penile discharge, low grade fever and an inability to pass<unk> ine. The exact number of individuals with acute prostatitis is unknown, because many do not seek treatment. In the US, at least 1–3 percent of males under the age of 40 develop<unk> inary difficulty as a result of acute prostatitis. Most physicians and other health care professionals are aware of these disorders. Worldwide, both BPH and acute prostatitis have been found in males of all races and ethnic backgrounds. Cancers of the<unk> inary tract can cause<unk> inary obstruction but the process is more gradual. Cancer of the bladder, prostate or<unk> eters can gradually obstruct<unk> ine output. Cancers often present with blood in the<unk> ine, weight loss, lower back pain or gradual distension in the flanks.<unk>  in females is uncommon, occurring 1 in 100,000 every year, with a female-to-male incidence rate of 1:13. It is usually transient. The causes of<unk>  in women can be multi-factorial, and can be postoperative and postpartum. Prompt<unk> ethral catheterization usually resolves the problem.
Urinary retention
Oliguria
Dysuria
Anuria
Cyclospasm
Polyuria
Urinary incontinence
Perfume intolerance