If a stiff, sore neck is your only symptom, it's probably not meningitis but only a doctor who examines you and runs tests can tell for sure. Some of the other symptoms of meningitis that usually accompany a stiff neck include:
Severe or worsening headache
Vomiting or nausea with headache
Confusion or difficulty concentrating
Even if it's not meningitis, a stiff neck that has not improved for several weeks should be checked by a doctor.
Lots of times we get worried because of one problematic system but we forget that disorders usually cause 'packages' of symptoms.
For instance, a heart attack in men is usually accompanied not just with chest pain but with lightedness, sweating, nausea, pallor etc. as well. In the same way, meningitis usually comes with a stiff neck and things like headache, fever, vomiting, sensitivity to light, etc.
Many of our symptoms that seem purely muscular in nature; ie involve pain in the muscles are, in fact, due to muscle strains we don't know we have and they usually resolve themselves in a week or two. Of course, only a doctor has the skill and experience to diagnose you correctly...and if you have pain that does not go away in a relatively short period of time - as you are having - you should see a doctor.
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