Maybe call Nurse on Call hun? They will be able to tell you if it's a normal reaction - I find them super helpful. xoxoxo FWIW my gf's son had a HUGE reaction to his 4 yr old needles, his arm from shoulder to elbow was bright red like he had a sunburn and was hot to touch but he wasn't too bothered by it. Turned out to be within the normal range of what can happen.