Heyie Doctor, My son is 20 months old...i got him vaccinated (which was due for 16 to 24 months) on last thursday and the vaccine which he got was two on his thigh and one on his arms. But since for two days there was huge pain in his leg. He cnt even walk for two days n the third da he started walking bt still wth some pain for relief i m using ice pack. so my question is... a) is it normal b) how long it will take to be normal so my question is