Though there are several air beds on the market, Sleep NumberÂ® beds are the only ones to feature DualAirâ¢ technology. This allows for an individualized level of firmness on either side of the bed. Each bed comes with a modular base and a 25 year warranty. Customers also receive a 100 day in home trial, during which time the bed can be returned for a refund if they aren't satisfied. Sleep Number beds come in a variety of styles and prices, ranging from approximately $1,000 to more than $4000.
Anal fissures are caused by trauma to the anus and anal canal. The cause of the trauma usually is a bowel movement, and many people can remember the exact bowel movement during which their pain began. The fissure may be caused by a hard stool or repeated episodes of diarrhea.
[edit on Wikidata] An anal fissure or rectal fissure is a break or tear in the skin of the anal canal. Anal fissures may be noticed by bright red anal bleeding on toilet paper, sometimes in the toilet. If acute they may cause pain after defecation but with chronic fissures pain intensity is often less. Anal fissures usually extend from the anal opening and are usually located posteriorly in the midline, probably because of the relatively unsupported nature and poor perfusion of the anal wall in that location.