My son had a light red bruise on his neck size of quarter. I asked where he got the hickey (haha). He said it wasn t in a teenage frustrated response. He leaned over to pick something up and I saw another one only more red. I said let me see that you have a bruise right below your collar bone. He pulled his shirt down more and I saw a third one. If this is not from promiscuity, is there a health condition that would cause it? They almost look like pinching marks?