On one delt. I wouldn't exactly call it swollen, just 'puffy.' To the touch, it is soft, and it isn't painful at all. It's no warmer than anywhere else, and I'm not experiencing any illness. It's been like this for over a week now. It is noticably larger than my other delt, though not huge. It doesn't really feel any different.
Any idea what it is? Should I worry about using the site for further injections?