Severe fever and persistent headache can indicate an infection or other serious condition that needs prompt medical evaluation. It is important to monitor your symptoms closely and seek urgent care if they worsen or are accompanied by other warning signs.

What you can do now:

• Take paracetamol (acetaminophen) to help reduce fever and relieve headache, following the recommended dose on the package.
• Stay well hydrated by drinking plenty of fluids like water, coconut water, or herbal teas.
• Rest in a cool, comfortable environment and avoid strenuous activity.
• Avoid self-medicating with antibiotics or other prescription drugs without a doctor’s advice.
• Watch for warning signs such as difficulty breathing, neck stiffness, confusion, persistent vomiting, or rash.

If your fever and headache persist beyond 2-3 days, worsen, or you develop any of the above warning signs, please consult a general physician or an infectious disease specialist promptly. They can perform necessary tests and provide appropriate treatment based on the cause.

If you want, I can explain how to recognize serious symptoms or discuss home care tips in more detail.To narrow down potential causes, we will need some more information.To assist you better, could you please provide your age and gender?