Internal Bleeding: Cause of Bleeding - Experience

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What was the cause of internal bleeding?

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What causes internal bleeding?

Bleeding most often occurs due to injury, and depending upon the circumstances, the amount of force required to cause bleeding can be quite variable. Some people can experience spontaneous bleeding not necessarily related to any injury or trauma.

Blunt trauma

Most people understand that falling from a height or being involved in a car accident can inflict great force and trauma upon the body. If blunt force is involved, the outside of the body may not necessarily be damaged, but enough compression may occur to internal organs to cause injury and bleeding.

  • Imagine a football player being speared by a helmet to the abdomen. The spleen or liver may be compressed by the force and cause bleeding inside the organ. If the hit is hard enough, the capsule or lining of the organ can be torn, and the bleeding can spill into the peritoneum (the space in the abdominal cavity that contains abdominal organs such as the intestines, liver, and spleen).
  • If the injury occurs in the area of the back or flank, where the kidney is located, retroperitoneal bleeding may occur.
  • The same mechanism causes bleeding due to crush injuries. For example, when a weight falls on a foot, the weight doesn't give, nor does the ground. The force needs to be absorbed by either the bone or the muscles of the foot. This can cause the bone to break and/or the muscle fibers to tear and bleed.
  • Other structures are compressible and may cause internal bleeding. For example, the eye can be compressed in the orbit when it is hit by a fist or a ball. The globe deforms and springs back to its original shape. Rarely, intraorbital hemorrhage (caused by orbital trauma) may occur.

Deceleration trauma

Deceleration may cause organs in the body to be shifted inside the body. This may shear blood vessels away from the organ and cause bleeding to occur. This is often the mechanism for intracranial bleeding such as epidural and subdural hematomas and subarachnoid hemorrage or bleeding. Force applied to the head causes an acceleration/deceleration injury to the brain, causing the brain to "bounce around" inside the skull. This can tear some of the small bridging veins on the surface of the brain and cause bleeding. Since the brain is encased in the skull, which is a solid structure, even a small amount of blood can increase pressure inside the skull and decrease brain function. The shaking within the skull may also cause bleeding within the brain tissue itself (intracerebral hemorrhage).

Organs within the abdominal cavity are often attached by a pedicle (stalk) to arteries and veins that provide blood supply. In a deceleration injury, the pedicle can shear off, tearing the blood vessels, causing bleeding.


Bleeding may occur with broken bones. Bones contain the bone marrow in which blood production occurs. They have rich blood supplies, and significant amounts of blood can be lost with fractures. The break of a long bone such as the thigh bone (femur) can result in the loss of one unit (350 cc to 500cc) of blood. Flat bones such as the pelvis require much more force to cause a fracture, and many blood vessels that surround the structure can be torn by the trauma and cause massive bleeding.


Bleeding in pregnancy is never normal, though not uncommon in the first trimester, and is a sign of a potential miscarriage. In the first few weeks of pregnancy, there is concern that vaginal bleeding is a potential sign of tubal or ectopic pregnancy, in which the placenta and the fetus implant in the Fallopian tube or another location outside of the uterine cavity. As the placenta grows, it erodes through the tube or other involved organs and may cause fatal bleeding unless the ectopic pregnancy is recognized and treated.

Bleeding after 20 weeks of pregnancy may be due to placenta previa or placental abruption, and urgent medical care should be accessed. Placenta previa describes the situation in which the placenta attaches to the uterus close to the opening of the cervix and may cause painless vaginal bleeding. Abruption occurs when the placenta partially separates from the uterine wall and causes significant pain with or without bleeding from the vagina.

Bleeding after surgery

Whenever a surgeon cuts into the body, the potential for immediate and delayed bleeding exists. When the operation is near completion, the surgeon tries to make certain that all bleeding has been controlled. This can be done by identifying and tying off blood vessels with sutures or using staples or clips to maintain hemostasis (hemo=blood + stasis=inactivity, lack of flow). Cautery can be used to burn blood vessels to prevent them from bleeding. A little bleeding can be expected in most situtaions.

Sometimes, however, bleeding may occur after the surgery is performed. Blood vessels that have been cut may go into spasm with no evidence of bleeding. They may relax and begin bleeding many hours or days after the completion of a procedure. Similarly, sutures, staples, or clips can dislodge and allow a blood vessel to bleed. Many times the bleeding is self-limited as the body is able to repair itself. On occasion, the patient needs to be returned to the operating room so that the surgeon can explore the area and find the bleeding site. Depending upon the situation, an interventional radiologist may be able to find the bleeding blood vessel and repair it.

Spontaneous bleeding

Internal bleeding may occur spontaneously, especially in those people who take anticoagulation medications or who have inherited bleeding disorders. Routine bumps that occur in daily life may cause significant bleeding issues.


Internal bleeding in the gastrointestinal tract may be caused as a side effect of medications (most often from nonsteroidal anti-inflammatory drugs such as ibuprofen and aspirin) and alcohol. These substances can cause inflammation and bleeding of the esophagus, stomach, and duodenum, the first part of the small intestine as it leaves the stomach.

Alcohol abuse

Long-term alcohol abuse can also cause liver damage, which may cause bleeding problems through a variety of mechanisms including decreased protein and clotting factor production. Cirrhosis, or scarring of the liver, changes blood flow to the liver and leads to portal hypertension (increased pressure within the blood vessels that supply the liver). Esophageal varices (swollen blood vessels around the esophagus) may develop when the liver's blood supply is altered, and these swollen blood vessels that line the esophagus are prone to bleeding. As well, alcohol can be directly irritating to the lining of the stomach, leading to inflammation that can result in bleeding.

Return to Internal Bleeding

See what others are saying

Comment from: supergran0606, 45-54 Female (Patient) Published: July 19

I had pain under ribs and at back; turned out my appendix had ruptured causing an abscess the size of a large grapefruit next to my liver. By that time I had collapsed lung and pneumonia so they could not operate, but drained the abscess. There was also one attached to my stomach. A year later a very tiny appendix was removed, clearly the remainder of the appendix.

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Comment from: BuBruce86, 25-34 Male (Patient) Published: July 26

My story is a simple one of chronic alcohol abuse. Over a decade of very heavy binge drinking has done terrible damage to my internal everything. I have been diagnosed with esophageal varices. Basically when my blood pressure raises even slightly I run the risk of internal bleeding into my intestinal tract. The last time this happened my hemoglobin dropped to a 3.8 and I was airlifted to a major trauma center. Here I received 8 units of blood and a ton of vitamins, a drug to help stop the bleeding and 6 esophageal bands. This is now my life. Since I don't have health insurance I can only go get treatment at the emergency room. You can't feel the bleeding when it starts. You can only feel it right before you have the urge to uncontrollably vomit blood. And now you are hoping to get to a trauma center before you die. I have stopped drinking but this has only made my trips to the hospital less frequent. I get to face the fact that I will die as a young adult because of the damage I have done to my body. For everyone out there that suffers from this condition and it isn't their own fault I am so sorry for what you are going through. For sufferers like myself that brought this on by our own doing please get your story out to our youths before you pass. They need to see the dark side of what seems to just be fun drinking shenanigans.

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