Thanking for writing our query to us.
The dark bruises which your husband has developed are due to medicines which he is taking ( aspirin
). Its one of the sideeffect of antiplatelet drugs.Since he has undergone open heart surgery it is mandatory for him to take this medicine if stent
has being implanted to keep heart functioning properly 7 to prevent clot formation. So dont worry, just watch if he has bleeding from any other site & follow up regularly with your doctor as advised.