While it's also the sign of an ear infection, tugging can be a symptom of teething: The pain from the jaw gets transferred to the ear canal.
More in Teething Symptoms
When will my baby's first tooth start to poke through?How fast will my baby's teeth grow in?How long will my baby be teething?How can I tell if my baby is teething if I don't see any teeth coming through?Does excessive drooling mean my baby is teething?Can teething cause a fever?Can teething cause diarrhea?Why does my teething baby have a cough?Why does my baby have puffy gums?Why does my infant grind his teeth?
