In some cases, the parasite's presence around the brain can cause eosinophilic meningitis. Basically, an uptick in the number of a certain kind of white blood cell—your body's totally understandable reaction to a freakin' worm rummaging around in your skull—causes severe inflammation of the membrane that covers the brain and spinal cord. The symptoms include headache, stiff neck, tingling or painful feelings in the skin, low-grade fever, nausea, and vomiting, and these are signs that you should seek medical treatment immediately. There's no cure for the parasite itself, but doctors can manage your symptoms until your body's gotten rid of the bugs for good. Unfortunately, this waiting period can sometimes be quite unpleasant.