Q. A 42-year-old male presents to your clinic complaining of rectal bleeding and discomfort in the anal area. He reports that he has been experiencing these symptoms for the past several months and that they had been gradually worsening. The patient's medical history is significant for a sedentary lifestyle, chronic constipation, and a family history of hemorrhoids. During the physical examination, you note the presence of external hemorrhoids and confirm the presence of internal hemorrhoids upon digital rectal examination. After discussion with the patient regarding his symptoms and examination findings, you make a diagnosis of symptomatic hemorrhoids and refer him to a general surgeon for further evaluation and treatment. Based on the severity of the patient's symptoms and examination findings, the surgeon recommends a hemorrhoidectomy to remove the hemorrhoids. Which of the following is the most common complication of this procedure?