Like "This has been mentioned, but will testify to it being correct, change the location of the shot each time. I use my belly and sides. First two years did only the left side because of nerve damage and hardly felt anything. Two years later I'm looking in the mirror after shower and see that my left belly side has a little more fat and slightly discolored. Soooo.... move the injection site around, and I've found that rubbing the area after wards help keep down the bruising."