After 9 months of vaccination, my child's thigh has become swollen and there is a lot of pain when he moves his leg. Is this normal?

A. Thermophob you should apply and prior to that you should keep ice cube or cold pack on that area to subside spreading these is something that you can do 3 to 5 times in the day and along with that if the pain is severe please give paracetamol and repeat it every six hours if needed and consult the doctor as having little bit of swelling is okay but if the swelling is much it’s not good