I'm sorry to hear you're experiencing severe headache, neck pain with difficulty turning your head, and left-sided body pain including your arm and shoulder. These symptoms could indicate a serious condition that needs prompt medical evaluation.

• Severe headache combined with neck stiffness and pain can sometimes suggest conditions like meningitis or other neurological issues.
• Pain radiating to the left arm and shoulder, especially with headache, may also raise concern for cardiac causes such as angina or heart attack, which require urgent assessment.
• Muscle strain or inflammation could cause similar symptoms but should be ruled out only after serious causes are excluded.

Please seek immediate evaluation by an emergency physician or visit the nearest emergency department to ensure your safety. If you experience additional symptoms like chest pain, shortness of breath, weakness, confusion, or fever, call emergency services right away.

For ongoing pain management, medications like Zerodol-MR (a combination of a muscle relaxant and anti-inflammatory) may help muscle-related pain but should only be taken after a doctor’s assessment confirms it is safe and appropriate.

If you want, I can explain more about possible causes or what to expect during evaluation.To narrow down potential causes, we will need some more information.I understand you're having a severe headache, neck pain, and body pain. To assist you better, could you please share your age and gender?