It is a muscle spasm: When you yawn the jaw muscles can get out of sync and the main opening muscle of the jaw called the lateral pterygoid muscle can get a spasm.It is nothing to worry about. Be careful when you yawn. It is like a charley horse.
Answered 11/11/2020
4.9k views
A doctor has provided 1 answer
4 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question