Ecchymosis is the medical term for bruises. These form when blood pools just deep to the skin. Bruises are caused by blood vessel breakage. Bruises look like a mark on the skin that’s black and blue or red to purple. Bruises change color as they heal and most don’t need treatment.
Unexplained bruises could be a sign of an underlying medical condition.
Bruises respond to the force of gravity and therefore, over time, may be pulled to areas distal to the injury.
The healing of bruises is directly related to enzymatic and other physiological variables and the ability of the vascular system to carry breakdown products away.
The resolution of healing takes place in stereotypical fashions on an approximate timeline.
Protraction of timelines may suggest additional medical issues that might affect physical therapy effectiveness.
Physical therapist assistants may assess the status of a bruise secondary to trauma such as a ligament strain to discern how robust the healing process may be.
Day 1: Pink/Red. Fresh, oxygen-rich blood has pooled under the skin. May be swollen and tender.
Day 2-6: Blue/Purple. Blood loses oxygen and causes swelling.
Day 7: Pale Green. Hemoglobin breaks down.
Day 10-14: Yellow or Green. Bruise fades as blood is reabsorbed.
Day 14+: Yellowish-Brown or Light Brown. Bruise disappears.