Routine investigations required in patients presenting with a sensation of anal swelling include.
Anal visualization and rectal palpation to look for abnormalities around the anus and the lining of the rectum.
CT examinations, magnetic resonance imaging (MRI) examinations to assist in identifying abnormalities in the tissue structures surrounding the anorectum.
Laboratory tests such as routine blood tests, C-reactive protein tests and blood sedimentation to assist in determining whether the patient has a pathogenic microbial infection.