TL;DR: A locked jaw in cats is a high-urgency emergency caused by dislocations, fractures, or foreign objects that requires immediate veterinary attention. Do not attempt to force the jaw shut at home, as this can cause further injury or lead to accidental bites.
What are the common causes of a locked jaw in cats?
When a cat is unable to close its mouth, it is frequently due to a condition called Temporomandibular Joint (TMJ) luxation, where the jaw bone has slipped out of its socket. Other potential causes include a mandibular fracture, a foreign object (like a bone or stick) lodged in the back of the throat, or severe dental disease. This condition is physically distressing and prevents your cat from eating, drinking, or grooming properly.
Is a locked jaw considered a veterinary emergency for my cat?
- Contact your nearest emergency veterinarian immediately, as this is a high-urgency situation.
- Do not attempt to force the jaw shut at home, which can cause further structural damage.
- Be aware that your cat may bite accidentally due to intense pain and distress.
- Seek help immediately to avoid risks of dehydration or respiratory issues from the inability to swallow.
How can taking a photo of my cat’s face help the triage process?
- If it is safe and does not delay your trip, take a quick, clear photo of your cat's face.
- Provide the veterinary team with a visual of the jaw alignment before muscle spasms or swelling worsen.
- Help the clinic prepare necessary diagnostic tools, such as X-rays or sedation, before you arrive.
Clinical Context (Merck Veterinary Manual)
In cases where a cat presents with a locked-open jaw, potential etiologies include oral foreign bodies, neoplasms, injuries, or mucosal defects. Neurologic causes such as rabies, the nervous form of distemper, or other convulsive disorders should also be considered. Reluctance to swallow due to esophageal irritation or obstruction, or stimulation of GI receptors from gastritis or enteritis can also manifest similarly. Sublingual lesions, tonsillitis, conformational defects, metabolic disorders such as hepatic encephalopathy or uremia, and salivary gland abscesses should be investigated. It is imperative to eliminate rabies as a differential before attempting any oral examination. Treatment is aimed at addressing the underlying cause, whether local or systemic.
Chapter: Infectious Disease, Dentistry, Pathology
Source: The Merck Veterinary Manual, 11th Edition (Page 362)