Some people may experience sudden and severe muscle cramps in their anal canal. These spasms are more likely to occur at night than at.
Just as spasms of neck muscles cause headaches, spasms of the pelvic muscles causes proctalgia. Proctalgia is pain due to a spasm of the pelvic floor muscles, the muscles of the anal sphincter, or the muscles of the rectum. This causes severe stabbing pain like a knife sticking.
Four common causes of the symptom of rectal pain, pressure, or discomfort are. hemorrhoids,; anal fissures,; fleeting anal spasms (Proctalgia.