Headaches, albeit unpleasant, occur fairly often and aren't cause for alarm. What is alarming, however, is that a prolonged headache can mean something is wrong within. As inflammation in your brain progresses, you will feel more and more pain. If it persists for more than a day or two and won't go away after proper medication and sleep, that headache deserves medical attention. It's always better to be safe than sorry, so visit a doctor to clarify if it's encephalitis or just a false alarm.
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