My dog's jaw is sore and won't open. Vet has no answers. Help!

Question

My dog can’t open her jaw all the way. She can eat and drink just can’t yawn. Just went to a vet and they took X-rays and nothing is broken or out of place nor does she have MMM. Her muscles are just sore. They gave me medicine but can’t give me an answer. I just want her to open her jaw, do you have any ideas? Pet's info: Dog | Boxer | Female | unspayed | 52 lbs

Destini R. Holloway, DVM · Accepted Answer

With signs of muscle weakness, I would definitely have her tested for a condition called Myasthenia Gravis. This is an immune mediated disorder that can cause a multitude of symptoms including facial weakness, regurgitation, neck weakness and exercise intolerance. It can be tested through your vet and also treated for. The only other possible cause that comes to mind for a pet with muscle weakness and a tight jaw, would be tetanus, but you would expect a multitude of other symptoms including vomiting, fever, severe lethargy and inappetence. I hope that they can find out the cause soon! If she still comes up negative for anything after the additional test, then I would consider an MRI or CT scan on Xena moving forward. Best wishes and take care.

My dog's jaw is sore and won't open. Vet has no answers. Help!

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