Question: I remember hitting the back of my arm on the pointed edge of a box about 4 days ago. It caused a sharp pain but I did not notice anything after that. I now have swelling in the tricep but it is soft not hard there is no discoloration just a slight scratch XXXXXXX where I guess I hit the box. The appearance of the swollen area is as the loose skin of an elderly or obese person that hangs down a bit. This is not how my arm is and I only noticed this when drying off after a shower this afternoon-4 days after the event. I have to admit being a bit nervous and probably overly vigilant to any swelling in my body as I had angioedema in the genitals from the ACE Inhibitor Lisinopril in January. I no longer take that antihypertensive but I do take Benicar, an ARB. The area has a slight itch but does not look like angioedema with redness, etc. In fact the only noticeable characteristic is the swelling with a slight pain on touching on the place where I hit the box point.The area is not hot or warm and I am not bothered by any feelings of irritation. Is is possible to tell from this description if the swelling is from the impact of hitting the box or could it be a systemic problem that may be some form of angioedema either from medication or something else? I don't want to call myself a hypochondriac but I do tend now to worry about areas of swelling after this experience back in January.