I had a blood sample taken today for my annual physical. After the attendant removed the needle she pressed down on the needle hole and I felt a sudden painful sting that subsided slowly after a few minutes. Twelve house later there is a swollen hard lump in this spot (peanut size) --- it is now sensitive to the touch and a little pink spot surrounds the needle hole. The skin is not discolored. This has not happended to me before but I have had bruised skin several days after giving a blood sample. I am concerned since I leave for Mexico this weekend on a Habitat build. Should I ice it? Thoughts please.