Hi again,
In my opinion, it's a bad sign because it means you have an overload of toxins in your body. Quoting from the above article:
"When a doctor uses an antibiotic and kills some Lyme spirochetes, there is a resultant Jarish-Herxheimer (Herx) reaction--i.e., a worsening of the patient's symptoms in response to the increased release of bacterial die-off toxins. The toxins are dumped into the bloodstream and circulated throughout the body, until they can either be eliminated by the body or lodged in areas of weakened tissues.
As neurotoxins, they are preferentially taken up by nerve tissue. These lodged toxins are one reason why symptoms can persist even after the actual Bb infection is gone, because the toxins can remain as an irritant in the tissues for years.
In truth, a severe Herxheimer reaction is a sign of poor elimination pathway drainage, poor organ support, and poor treatment by your doctor.
The bodies of most chronic Lyme sufferers are toxic dumps to start with, therefore, if a doctor does not get the pathways of elimination open and working, the body grows even more toxic as the bacteria begin to die and their toxins dump.
Many doctors think good treatment is indicated by the fact that you feel like crap, i.e., worse than usual, which they feel confirms that they have selected an effective antibiotic. Most of my chronically ill patients cannot afford to feel worse just from the treatment. The person with Lyme disease has already suffered enough; they don't need to go through a "herx" just to prove they have Lyme disease."
Hope this helps,
Denise