It could be a fungal or bacterial infection as Russ says... are you doing an anti candida diet? It is really important to eliminate the yeast and optimize digestion when dealing with heavy metals. Most of us cannot tolerate gluten, dairy, caffeine or sugar...they are definitely on the avoid lists. Check out the food lists at this site, they have tons of good recipes too.

http://wholeapproach.com/

Hope this helps.

Sandi