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We have recently reported success in overcoming the problems of dyssynergia in some patients utilizing a technique called anal sphincter stretch in which relaxation of the external anal and urethral sphincters is produced by sustained distention of the anal sphincter. This has lessened the need for other measures that usually produce incontinence. And a tight sphincter can lead to pain and tearingwhich nobody wants. Use a condom you already know its important for safe sex, but its super important for anal. Most people cant do the splits without a lot of stretching and training first turns out its the same for stretching your anus. My worry is that my anus will permanently stretch out, and never return to its previous tightness this is a great concern for me because, as a virgin, id like to be tight for the first time i receive anal from a real guy, and not all loose. Id heard there were excercises to help keep the anal muscles tight, but im worried those might not work. The internal anal sphincter is an involuntary muscle, which means you cannot consciously control it. Similar to your beating heart and your diaphragm, this muscle does its job every second of the day without you having to think about its function. The internal sphincter is programmed to stay shut, which is why most adults do not leak stool while they sleep. The external anal sphincter measures about 8 to 10 cm in length, from its anterior to its posterior extremity, and is about 2. 5 cm opposite the anus, when defecation occurs the sphincter muscle retracts. Though resting sphincter tone is predominantly attributed to the internal anal sphincter, studies under general anesthesia or after pudendal nerve block suggest the external anal sphincter generally accounts for approximately 25, and up to 50, of resting anal tone. 9, 33, 40, 50, 144, 170 when continence is threatened, the external sphincter contracts to augment anal tone, preserving continence. The sphincter is the ring of muscles in your anus and lower rectum. It controls the opening and closing of the anus to enable the passage of stool. Anal fissures are usually noticed by red anal bleeding on the toilet paper. If you have chronic problem with anal fissure than you are probably experiencing severe periodic pain after defecation. Anal fissures are usually extending from the anal opening and their depth can be superficial or sometimes even down to the underlying sphincter muscle. This reflex relationship between the internal anal sphincter and the urinary bladder was named anovesical reflex. 10 in our experiment, we applied a vigorous and rapid stretch to the anal sphincter with a 5-cm depth, which reached the level of internal anal sphincter. 17 however, the response of detrusor pressure was not significant with only a minimal increment in the first half (median of.).