If he tensed up when the shots were given the needle has to push through tight muscle so his muscles are probably very sore, esp if a nerve was hit. The DtaP vaccine at 15 months is also notorious for giving sore muscles. Even the DtaP (tetanus) as an adult gave my arm such pain I could hardly move it for a couple of days.

Is he able to move them? If not could be a vaccine injury.

I mean it’s known to be normal for a short period of time but if it continues or he’s screaming then see a doctor to be safe...

The babys legs could be sore after getting the shots but if he got his shots yesterday and it’s been a day then at this point he needs medical attention...

@1bow3ties, I believe so

No. Can’t walk! I told her to call the ped and go in!