Posted 1/17/2017 5:56 PM (GMT 0)
It is usually just toxins being pushed out, as the others have said, but it can also be a sign of a yeast issue. Do be sure to check to see if you are showing any other signs of a yeast infection. Pirouette has a very wonderfully detailed post about yeast/fungal issues at the bottom of page 2 of our 'New to Lyme?' thread, and there are a ton of other sites with symptom lists.
You will see that many of the symptoms actually 'cross over' with Lyme symptoms, so it may be kind of hard to determine.