well i woke up this morning and went into the hospital. My injection site swelled up to be as big as both my hands put together and it was very hot. I also had blood clots in there also where you could see very dark red circles about the size of a golf ball where blood was just sitting there. The doctor was a dick about it and told me I had an infection and called it cellulitis and prescribed me keflex. I have no idea how I got it I do everything like I am supposed too. It took me 3 times of going in to get the shot in I kept getting blood in the needles from aspirating(i did change the needle tip everytime). I never had that happen to me before in the glute.Do you think it could be scar tissue buildup or what? It kinda worries me about my next injection today.