You must get a bleeding time, clotting time done and must reduce the dose or go off Plavix and take an alternative, after consulting a cardiologist. If
Plavix is not the only cause then bruises could be due to
internal bleeding from torn capillaries. The other possible reasons are low platelet count, clotting disorders, fragile spider veins, deep vein thrombus, deficiency of Vitamin B12, folic acid, or Vit K, a liver disease or certain cancers (less likely in your case).