I have been on the injection for about a month now. I have been doing the injection, a certain way. I started by injecting in the leg where i was told. When i pressed the fluid in its a sturggle. until it finally goes in. my thigh feels sore after the injection. I have notice a bit of swelling, no discoloration, or serious pain. My next injection is tomorrow. I am a bit concerend about the swelling. Is it normal for it to swell.