The most common complication after hemorrhoidectomy is which of the following?

a. Urinary retention

 Hemorrhoidectomy should be considered when the hemorrhoids are severely prolapsed through the anus, requiring manual replacement, or in hemorrhoids complicated with associated pathology, such as ulceration, fissure, fistula, large hypertrophied anal papilla, or extensive skin tags. An elliptic excision starts at the perianal skin, includes external and internal hemorrhoids, and ends at the anorectal ring. The mucosa and submucosa are dissected off the underlying internal sphincter muscle. Unless there is an associated anal stenosis or chronic anal fissure, internal sphincterotomy is not performed. The entire wound is closed with running absorbable suture. The largest and the most redundant hemorrhoid should be excised first. No packing is placed in the anal canal. Urinary retention is the most common complication of hemorrhoidectomy, and can be avoided if intravenous fluids are restricted during the procedure and minimized for the next 6 to 8 hours.