Please help! what is the most comfortable mouth guard?

Over the counter: Hard to say. Everyone is different. Probably the best answer would be to see your dentist. You might also check the pharmacy, and try an over the counter mouty guard. You may have to try several types to find the best one for you.

All Depends: There are many mouth guards that are comfortable. It all depends on what the use for the mouth guard is. For sports, you would want protection over the most comfortable. For grinding/clenching, a hard horse shoe type mouth guard is good too. Once it is known what the reason for the mouthguard is, the easier it would be to answer.

Everyone's different: Whether you're talking about an athletic mouth guard or a night guard for dental occlusion issues, the best person to answer this is your Dentist. That's who knows you and what would work best for your issues.