A few babies begin teething at three to four months, but most don’t start until about six to seven months. Most babies are not troubled by the teething process, but are irritable, eat poorly, may have loose stools, and have trouble sleeping when teeth begin to arrive. Teething does not cause fever. If your baby seems uncomfortable, you may want to give baby TYLENOL® (acetaminophen) or apply a mild topical anesthetic to the gums. Teething toys and biscuits are also helpful. A cold washcloth to chomp on may also help.