Fresh cilantro, a teaspoon or two of leaves, plus about 50-75 mgs of DMSA keeps me headache free. Just at night before bed, no major big routine. Don't eat a big meal for 3 hours before taking that.

The IV DMPS may have helped also. Before my doctor would give me the DMPS on a regular basis, the other chelation (EDTA) would leave me with a pretty good stuffy head and possible headache. Gone now though for the most part (even after EDTA) as long as I maintain the cilantro and DMSA. Those first few weeks of only IV EDTA were h_ll but I am so much better now because of the other combo chelators and the lack of headaches.

the headaches are completely debilitating. If your face is numb and you are sure it's mercury you should go in at least just once or twice for the DMPS if you can, it helps a whole lot, gets rid of a lot of mercury real fast.