What causes left jaw pain, and when is it an emergency?
Quick answer
Jaw pain may come from teeth, the jaw joint or other causes. With chest pain or pressure, breathlessness, sweating or nausea, seek emergency care. The side of the pain alone does not identify its cause.
Details
Do not delay concerning symptoms
Heart-attack pain may spread to the jaw, and symptoms vary. If a cardiac emergency is suspected, call emergency services instead of driving or waiting for a dental appointment.
Without emergency signs
Tooth-related pain or swelling needs dental assessment. Pain near the ear or jaw with clicking or limited opening may involve the jaw joint, but examination is needed. Describe links to chewing or exertion, duration and injuries. Do not undertake permanent jaw treatment based on an online description.
Related question: When should I see a dentist?.
Note: This answer is for educational purposes and does not replace a consultation with a specialist who examines your case in person. Do not use it for self-diagnosis.