My underbite is making me uncomfortable, what can i take for this?

A telephone: Take your finger and dial an orthodontic specialist. There's no pill, liquid, salve, snake oil, massage, app, computer program, or dietary supplement that will "fix" an underbite. Usually requires a combination of treatment provided by 2 specialists, an orthodontist and an oral surgeon. Call now for examination to learn the extent of your problem and the available treatment choices.