I've had a stiff neck all week. Is this ever a cause for concern?
Answer: Yes, especially if you also have a high fever, severe headache, vomiting, and a purplish rash that looks like a bruise. You could have meningitis, a serious infection of the meninges -- the tough layer of tissue that surrounds the brain and the spinal cord. Other possible symptoms include seizures, sleepiness, sensitivity to light, and dizzy spells.
Check your symptoms with WebMD's Symptom Checker.