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Micturition syncope or post-micturition syncope is the name given to the human phenomenon of fainting shortly after or during urination. The underlying cause is not fully understood, but it may be a result of vasovagal response, postural hypotension, or a combination thereof.
The normal amount of urine that the body produces tends to decrease at night while we're sleeping, says Lloyd-Harris. However, some people find themselves waking up to pee most nights.
Nocturia is defined by the International Continence Society (ICS) as "the complaint that the individual has to wake at night one or more times for voiding (i.e., to urinate)". [1] The term is derived from Latin nox – "night", and Greek [τα] ούρα – "urine". Causes are varied and can be difficult to discern. [2]
Situational syncope is often triggered by urination, swallowing, or coughing. [2] Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2]
The first ability is a hormone cycle that reduces the body's urine production. At about sunset each day, the body releases a minute burst of antidiuretic hormone (also known as arginine vasopressin or AVP). This hormone burst reduces the kidney's urine output well into the night so that the bladder does not get full until morning. This hormone ...
Enuresis is a repeated inability to control urination. [2] Use of the term is usually limited to describing people old enough to be expected to exercise such control. [3] Involuntary urination is also known as urinary incontinence. [4] The term "enuresis" comes from the Ancient Greek: ἐνούρησις, romanized: enoúrēsis.
Frequent urination, or urinary frequency (sometimes called pollakiuria), is the need to urinate more often than usual. Diuretics are medications that increase urinary frequency. Nocturia is the need of frequent urination at night. [1] The most common cause of this condition for women and children is a urinary tract infection.
Symptoms include overactive bladder, urinary urgency, frequency, incontinence or difficulty passing urine. [3] A range of diseases or conditions can cause neurogenic bladder including spinal cord injury , multiple sclerosis , stroke , brain injury, spina bifida , peripheral nerve damage, Parkinson's disease , multiple system atrophy or other ...