Because symptoms can overlap among many different health conditions, professional medical evaluation remains the most reliable way to determine the cause.
Chapter 3: How the Body's Blood-Clotting System Works
The body relies on a complex system to stop bleeding and repair damaged blood vessels. Platelets, clotting proteins, and healthy blood vessel walls all work together to prevent excessive bleeding after injury.
When any part of this system is disrupted, bruising may become more common. A low platelet count, for example, can reduce the body's ability to control small areas of bleeding beneath the skin.
Certain inherited conditions may affect clotting function. In other cases, liver disorders can interfere with the production of clotting factors needed to prevent bleeding.