What causes hematoma?

Most commonly, hematomas are caused by an injury to the wall of a blood vessel, prompting blood to seep out of the blood vessel into the surrounding tissues.

Any injury that scratches the wall of a blood vessel leading to the leap of blood out of the vessel and into the surrounding tissue to be accumulated

Haematoma is seepage of blood into the tissue resulting swelling

The most common cause of a hematoma is injury or trauma to blood vessels.

* Vein pencture

* Not apply the pressure after collect the blood

1. If the phlebotomist pushes the needle too far into and through the vein, blood leaks out of that opening and into the surrounding tissue.
2. If the patient has a medical condition that impairs clot formation.
3. If the patient is taking blood thinner medications.

when the bevel of the needle is not completely in the vein and blood escapes into the surrounding tissue, causing a clot outside the point of entry.

DUE TO TRAUMA OR INJURY TO THE VEIN DURING VENIPUNCTURE. USUALLY BECAUSE OF THE BLOOD THAT LEAK FROM THE VEINS.

getting hit, causes hematoma

hematomas are caused by an injury to the wall of a blood vessel

Basically, hematoma is caused by trauma or improper drawing of blood from veins.