Hemorrhoids are a common cause of anal bleeding, itching, and pain. It is estimated that 4.4 % of the population has symptomatic hemorrhoids while the true prevalence of asymptomatic hemorrhoids is unknown [4]. Males and females are affected equally and peak around age 45–65 years old. Hemorrhoids are uncommon before age 20.

Hemorrhoids result from dilation of the veins around the anus and rectum. Internal hemorrhoids originate above the dentate line [1]. They are covered by columnar epithelium, which lacks pain receptors. They were classified into four grades based on the degree of prolapse [2].

External hemorrhoids occur below the dentate. They have somatic innervations and thus are sensitive to pain and temperature [2].