Internal Bleeding

  • Medical Author:
    Benjamin Wedro, MD, FACEP, FAAEM

    Dr. Ben Wedro practices emergency medicine at Gundersen Clinic, a regional trauma center in La Crosse, Wisconsin. His background includes undergraduate and medical studies at the University of Alberta, a Family Practice internship at Queen's University in Kingston, Ontario and residency training in Emergency Medicine at the University of Oklahoma Health Sciences Center.

  • Medical Editor: Melissa Conrad Stöppler, MD
    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

Caring for Wounds Slideshow

Quick GuideDigestive Disease Myths Pictures Slideshow: Common Misconceptions

Digestive Disease Myths Pictures Slideshow: Common Misconceptions

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.

Fractures

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.

Pregnancy

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.

Medication

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.

Medically Reviewed by a Doctor on 1/26/2016

Subscribe to MedicineNet's Newsletters

Get the latest health and medical information delivered direct to your inbox!

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

VIEW PATIENT COMMENTS
  • Internal Bleeding: Cause of Bleeding - Experience

    What was the cause of internal bleeding?

    Post View 25 Comments
  • Internal Bleeding - Signs and Symptoms

    What were the signs and symptoms associated with internal bleeding?

    Post View 4 Comments
  • Internal Bleeding - Diagnosis

    Describe the tests and exams you had to find the source of internal bleeding.

    Post View 3 Comments
  • Internal Bleeding - Treatment

    What kinds of treatment did you receive to identify and stop the source of internal bleeding?

    Post

Health Solutions From Our Sponsors