3) Liver disease:
The liver is responsible for the formation of most proteins in our circulation including albumin, which forms the bulk of proteins in our blood and most coagulation factors. The liver can lose its function due to chronic or acute causes. Diseases like hepatitis whether acute or chronic, viral or autoimmune as well as alcoholic and non-alcoholic fatty liver can damage the liver beyond its capacity to produce enough prothrombin, a key protein and enzyme in coagulation. This can cause easy bruising along with other manifestations of liver disease like jaundice, malnutrition, ascites, gastrointestinal bleeding and hepatic encephalopathy -central nervous system derangement in hepatic failure-.