The pain in your left jaw when opening your mouth, along with acidity, could be related to muscle strain, temporomandibular joint (TMJ) issues, or acid reflux irritating nearby tissues.

🩺 Managing Your Jaw Pain and Acidity

• Apply a warm compress to the jaw area to ease muscle tension.
• Avoid wide mouth opening, chewing gum, or hard foods that strain the jaw.
• For acidity, eat smaller, frequent meals including mild Indian foods like khichdi, curd rice, and avoid spicy, fried, or acidic foods.
• Over-the-counter pain relief such as a non-steroidal anti-inflammatory drug (NSAID) like Naproxen may help, but only use it if prescribed by your doctor and avoid if you have stomach issues worsening acidity.
• Maintain good hydration and avoid alcohol or smoking, which can worsen acidity and inflammation.

⚠️ When to See a Doctor

• If jaw pain worsens, limits mouth opening severely, or is accompanied by swelling or fever.
• If acidity symptoms persist despite dietary changes or cause severe discomfort.
• If you experience chest pain, shortness of breath, or other concerning symptoms, seek emergency care immediately.

Consult a dentist or an oral and maxillofacial specialist to evaluate your jaw pain and a gastroenterologist for persistent acidity issues for tailored treatment.To narrow down potential causes, we will need some more information.To help me understand your situation better, could you please tell me your age and gender?