amato
For Headache due to Herxheimer(and from other causes also) I rubbed some fresh squeezed lemon juice on my fronthead and the nearby areas a couple times/day. Be cautious with the eyes, so as the juice doesn't come in contact with them.
I had instant relief.If you want repeat more often. It's great
Good luck
Greetings from the Mediterranean
PS Don't forget also to drink lots of water to flush the toxins out of your body