Hello, I have a question. I'm in school currently learning about injections. I have started to give vaccinations such as flu shots and tdap. Each time I give an injection right after the patient is okay, I confirm that they are fine throughout the entire injection and after. A few days after they end up having either a red, hot patch at the injection site, or will have a bump from where the injection was given. Is there something that I'm doing wrong? I am aspirating and not seeing any blood. Does if have to do with the way I am pinching the skin at the top of the deltoid? Any feedback helps. It is really starting to get me discouraged. Thanks,