A thrombosed hemorrhoid is a condition in which a blood clot forms
inside a swollen vein in the anus.
External hemorrhoids form outside the anus. This type of hemorrhoid
is more likely to develop a blood clot than an internal hemorrhoid, which
develops within the anal canal.
Symptoms of a thrombosed hemorrhoid include:
A very painful lump of soft tissue outside the
anus. It may feel like a small, very tender pebble near the
Constant pain that is made worse by passing hard
Thrombosed hemorrhoids affect only the small veins near the skin
surface (superficial veins). Unlike blood clots in the deep veins, blood clots
in thrombosed hemorrhoids do not travel to the lungs or another part of the
body and do not cause serious problems.
Home treatment may help relieve the symptoms of thrombosed
hemorrhoids. Minor surgery is sometimes needed to remove a painful clot.
Anne C. Poinier, MD - Internal Medicine & Kenneth Bark, MD - General Surgery, Colon and Rectal Surgery
The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.