What are some ways to relieve teething pain in infants?

Cold theraphy. Applying a frozen gel toy or melba toast can relieve teething pain without medication. Gentle rubbing of the gums with your finger can bring relief as well. Do not use ice cubes as they can be a choking hazard.
Toys and Tylenol (acetaminophen) There are many different teething toys some you can even freeze. Tylenol (acetaminophen) is what i most recommend to be given on ocassion and numbs it or oragel. I still find tylenol (acetaminophen) to be the best.
Anesthesia. Ice cubes rubbed on gum tissue give relief for most kids. If that does not work get some topical Benzocaine at a pharmacy and apply with a qtip.