My husband has a half dollar size plus back and blue bruise on his abdomen. There is also a small hard spot under the bruise. He did not suffer any physical trauma. It has been there about a week. His medical history includes Parkinson s disease (diagnosed 2 years ago). He also has 4 cardiac stents. His bp and other basics are fine. He does take PLavic and meds for parkinson and depression. Any ideas.