Some important risk factors that can cause bruises include:
- Suffering from bleeding disorders
- Intake of blood thinning medicines
- Vitamin deficiency
- Older age
Sometimes bruising may be accompanied by the following kinds of bleeding disorders.
- Von Willebrand disease
- Hemophilia A
- Christmas disease
- Factor VII deficiency
- Factor X deficiency
- Factor V deficiency
- Factor II deficiency
Acute bruises appear due to burn, cut or fall, and can recover through the body's natural healing process.
Certain medications such as blood thinners and corticosteroids may cause bruises due to the blood-thinning effect. Some herbal supplements like fish oil produce a similar effect of bruising.
Other possible reasons for bruising develop after injection or wearing tight clothes are also noticeable in an affected person.