When neck cramps occur in yawning, it is usually due to the continuous force of the muscles of the upper cervical spine due to the opening of the mouth muscles when yawning, resulting in local muscle cramps. If you want to relieve the cramp, you must immediately close your mouth and do some neck exercises to continuously stretch the cramped muscles, usually through 5-10 minutes, the symptoms can be slowly relieved. But after the relief of the local muscles will also appear pain, you can give local heat compress, using hot towels, warm water bags or salt bags to local heat compress, each compress 20-30 minutes, generally 2-3 times a day, the symptoms will soon be relieved. If the cramps are still persistent and not relieved by the above, you need to go to the hospital for further treatment, usually given sedation treatment, the application of Valium or phenobarbital to sedate the muscles can generally be relieved, you can also apply some central muscle relaxation drugs, such as the commonly used is Eperisone to take orally.