It appears that paruresis involves a tightening of the sphincter and/or bladder neck due to a sympathetic nervous system response. The adrenaline rush that produces the involuntary nervous system response probably has peripheral and central nervous system involvement. The internal urethral sphincter (smooth muscle tissue) or the external urethral sphincter (striated muscle), levator ani (especially the pubococcygeus) muscle area, or some combination of the above, may be involved. It is possible that there is an inhibition of the detrusor command through a reflex pathway as well. The pontine micturition center (Barrington's nucleus) also may be involved, as its inhibition results in relaxation of the detrusor and prevents the relaxation of the internal sphincter.

Paruresis ( ) is a type of phobia in which the sufferer is unable to urinate in the real or imaginary presence of others, such as in a public restroom. The analogous condition that affects bowel movement is called parcopresis.

In the past, when the prevalence was estimated by sampling the psychiatric clinical cases, social phobia was thought to be a rare disorder. It is now recognized that this way of estimating is inappropriate, because people with social phobia rarely seek psychiatric help by the very nature of their disorder. A more reliable source used now is community surveys.

Various surveys show that the syndrome of glossophobia is the most prevalent type. An article based on a National Comorbidity Survey reported that 1/3 of people with lifetime social phobia suffered from glossophobia Another survey of a community sample from a Canadian city reported that of people who believed being anxious in one or several social situations 55% feared speaking to a large audience, 25% feared speaking to a small group of familiar people, 23% feared dealing with authority, 14.5% feared social gatherings, 14% feared speaking to strangers, 7% feared eating and 5% feared writing in public.

Treatment of social phobia usually involves psychotherapy, medication, or both.