Can you get blisters from wearing a mouthpiece?

Yes, wearing a mouthpiece can cause blisters, particularly if it doesn't fit properly or if it's made from irritating materials. Friction between the mouthpiece and the gums or inner cheeks can lead to irritation and blister formation. Ensuring a proper fit and using mouthpieces made from soft, flexible materials can help minimize this risk. If blisters occur, it's advisable to take a break from using the mouthpiece and consult a dental professional.