Hello. I have an infant who just turned 4 months old. He is currently over 15 pounds and was born a few weeks early. His mother had preeclampsia and gestational diabetes. There are times at night he gets really hyper-active (loots of drooling, frequent movement of arms and legs, and has cold sweats around his arms and legs), also his head and back tend to get very hot at the same time. This is my first child and was inquiring to see if this is normal. His checkups have been fine, it was recently he has gotten this hyper. We believe he may also be teething. Monday, we will call our local pediatrics in the mean time.