It sounds frustrating to have your neck pain and headaches return after initial relief with Zerodol-MR. This medication combines a muscle relaxant and an anti-inflammatory to reduce pain and muscle stiffness, but persistent symptoms suggest you should follow up with a doctor for further evaluation.

• Since the pain has returned, it’s important to see a specialist such as an orthopedic doctor or a neurologist to identify the underlying cause and adjust your treatment.
• Avoid self-medicating beyond the prescribed course, as prolonged use of Zerodol-MR can have side effects like stomach issues or drowsiness.
• Meanwhile, applying gentle heat or cold packs to the neck and practicing good posture may help reduce discomfort.
• If you experience worsening pain, numbness, weakness, or any new neurological symptoms, seek urgent medical attention.

Consulting a specialist will help tailor a safe and effective plan to manage your symptoms and prevent recurrence. If you want, I can explain more about how Zerodol-MR works or suggest other supportive measures.To narrow down potential causes, we will need some more information.Could you please share your age and gender? I understand that you're having persistent pain on the right side of your neck, which is causing headaches.