Seems pretty normal for after a round of shots

Definitely keep an eye on it because if it gets bigger I say go to the dr and document the reaction. Also, make sure the dr reports this reaction as well just for future reference. That’s noticeable big and puffy and not meaning to scare you but could be the beginning stages of a bad reaction/allergy. My son did this and the next day I took him to the ER because it got bigger and bigger and he was in a lot of pain, wouldn’t eat, was extremely lethargic and screamed uncontrollably when he was awake. It took about a week for it to go down and not be sore to touch

Draw a circle around it and if it gets bigger then go to the hospital/doctor. If it's hot to touch, put a cold rag on it. Even if it hurts to touch, you should still try to rub it a little.