hi Prism, I don't know if this will help, but I have had similar problems. I soak my feet in hot water with Epsom Salts or Sea Salt in it. The body likes to throw off poisons to the extremeities. Thats' why you see all these advertisements for detox foot pads and foot baths that pull poisons from the body through the feet. To soak feet in a hot water bath for 5 to 10 minutes before bedtime is known to also help balance the meridians. We are all seeking balance. As far as the pain on the left side, I was thinking it was my spleen or pancreas, or maybe even little critters dying off due to the iodine. I let up on the Iodine long enough for it to clear out.
I do try to take enough vitamin C so that if there's any critter die off it will be non toxic or detoxified IMO.