Anal bleeding is a cause for concern. This may show itself in a number of ways including as:
There are many arterial blood vessels in the anal area to supply the muscle tissue around the anal canal and this blood supply is readily available to hemorrhoids. If you suffer from internal hemorrhoids you will know that the colour of the blood from anal bleeding is usually bright red indicating it is arterial blood.
You will also know that there can be quite a lot of blood appearing in a short space of time but it usually stops quite quickly. However it is possible for this bleeding to be more serious and prolonged if the damage is greater to the hemorrhoid though which the blood vessels pass.
Causes of Blood Stool from Anal Bleeding
In the case of internal hemorrhoids the damage to the tissue can become more frequent as the hemorrhoid gets bigger. This is particularly so if you are constipated and straining to pass the stool when the hemorrhoid tends to get swollen and distended with blood. As the stool passes by, and particularly if it is the hard stool associated with constipation, the hemorrhoid can be damaged and results in the rupture of the blood vessels.
Diagnosis of Feces Blood
Your medical professional has to rule out other causes of feces blood when diagnosing your problem. This is because other sometimes more serious conditions can cause hemorrhoid-like symptoms. These conditions include inflammatory bowel disease and colorectal cancers as well as anal fissures and infections.
It is normal practice for the medical professional to rule out bleeding from the colon by conducting a visual examination using a special tool because its possible for colon cancer, polyps or colitis to cause this bleeding as well.
For more on the causes of hemorrhoids you can read this article: “Causes of hemorrhoids and what they want covered up“
An anus lump (or anal lump) can form in an external hemorrhoid when blood clots inside of the hemorrhoid. This is known as a thrombosis and can be very painful because the area has many somatic nerves. Somatic nerves are like the nerves of the skin and sense pain unlike the visceral nerves of the anal canal which only sense pressure. The discomfort often results in the need for medical attention.
Treatment of an anal lump will depend on it’s severity in terms of the amount of pain and the extent of the swelling the blood clot causes. If the condition is only mild then you can be treated with sitz baths and bulking up and softening of the stool through increased dietary fibre.
If the pain and swelling are severe enough it may be necessary to remove the blood clot. This can be done under local anesthetic. A small incision is made in the hemorrhoid and the blood clot removed. A small bandage will be put on the hemorrhoid to stop the bleeding and prevent the blood clot from reforming.
When thrombosed hemorrhoids heal it may result in some scar tissue and leave a tag of skin protruding from the anus. Sometimes this may be a source of irritation when the tag is large enough because it can make cleaning of the area difficult.
Caution: Any anus lump needs to be checked by your medical professional and it should not be assumed to be a hemorrhoid since there are rare cancers of the perianal area that can appear as external hemorrhoids.
Hemorrhoids
There is no precise definition of hemorrhoids but here are a few for starters:
“What are hemorrhoids? A precise definition of hemorrhoids does not exist, but they can be described as masses or clumps (“cushions”) of tissue within the anal canal that contain blood vessels and the surrounding, supporting tissue made up of muscle and elastic fibers.” Medicine Net, Inc.
“Hemorrhoids (AmE), haemorrhoids (BrE), emerods, or piles are swelling and inflammation of veins in the rectum and anus. The anatomical term “hemorrhoids” technically refers to “‘Cushions of tissue filled with blood vessels at the junction of the rectum and the anus.”[1] However, the term is popularly used to refer to varicosities of the hemorrhoid tissue.” (Ref. [1] MedlinePlus Medical Encyclopedia). Wikipedia
“What are hemorrhoids? The term hemorrhoids refers to a condition in which the veins around the anus or lower rectum are swollen and inflamed. Hemorrhoids may result from straining to move stool. Other contributing factors include pregnancy, aging, chronic constipation or diarrhea, and anal intercourse. Hemorrhoids are either inside the anus—internal—or under the skin around the anus—external.” National Digestive Diseases Clearing House (NDDIC)
If you suffer from them like around 50% percent of the American population by age 50 then you already have a grasp of the discomfort they can cause.
As they say a picture speaks a thousand words, source is Wikipedia:
Diagram to show a variety of Hemorrhoids. Drawn by User:WikipedianProlific

The right hand side shows the hemorrhoid cushions in their normal state. The upper “internal cushions” and the lower “perianal blood vessels”.
The left hand side shows the internal hemorrhoid cushions, now enlarged internal hemorrhoids as prolapsed hemorrhoids. This is the term for when they swell up and extend through the anus.
The left side also shows enlarged external hemorrhoids.
Hemorrhoid symptoms
Hemorrhoids usually are not dangerous or life threatening. In most cases, hemorrhoid symptoms will go away within a few days. Although many people have hemorrhoids, not all experience symptoms. The most common symptom of internal hemorrhoids is bright red blood covering the stool, on toilet paper, or in the toilet bowl.
However, an internal hemorrhoid may protrude through the anus outside the body, becoming irritated and painful. This is known as a prolapsed hemorrhoid (or protruding hemorrhoid). Symptoms of external hemorrhoids may include painful swelling or a hard lump around the anus that results when a blood clot forms. This condition is known as a thrombosed external hemorrhoid.
In addition, excessive straining, rubbing, or cleaning around the anus may cause irritation with bleeding and/or itching, which may produce a vicious cycle of symptoms. Draining mucus may also cause itching.