My 2 months baby bite himself while sucking the milk bottles and every time he sucks the bottle cried ?

Crying with feeds: is sometimes hard to diagnose in an small infant. Sometimes the milk is too hot or too cold, the hole in the nipple may be too slow or fast so it is hard to drink or causes gas, your infant may not tolerated the milk or be allergic to it, or he may not be hungry, just fussy or colick. Please discuss this with your doctor who can check his weight to see if he is growing on schedule as well.