I've had multiple very thin pts. refuse the injection if it could not be given in another location than abd. By the description of the events, it would seem that when they were given the injection it was IM not SQ....hence extremely painful and they refused it ever again. I have had some of the emergency physicians state that it can be given in the upper arm SQ (ie: as you would with allergy shots). My father happens to be one of those such pts and refuses to even let me give him an injection in his abd. He has had it in his arm without any complications. With a very thin pt you must must pinch up the skin to ensure you do not give the injection IM. I too questioned the manufacturer but got no reply. I have never given an injection that someone told me it was painful or bruised. I gave them to my mother after knee replacement for at least a month, none of which bruised. However, some of the ones given in rehab left enormous bruises. I always pinch up the skin.