Facial Pain and Bite Changes after anterior appliance

comments : i wore an anterior nightguard which changed my bite. i now have an open bite. only one molar touches down. a few months into wearing this night guard, i had a sudden onset of excruciating tooth pain which started on one side of my teeth and spread to the other side within one week. the nerves in my face were also affected as my cheeks ache and also my forehead and scalp. my neuro says