TY - CHAP M1 - Book, Section TI - Hemorrhoids A1 - Dooley-Hash, Suzanne A1 - Herrman, Nicholas W.C. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Internal hemorrhoids originate proximal to the dentate line and have visceral innervation. They commonly present with painless, bright red rectal bleeding after defecation. This results from the passage of stool over the thin-walled venules, causing abrasions and bleeding. Patients may also complain of a sensation of anal fullness from prolapse of the vessel. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181041479 ER -