Chlorella is a mobiliser of toxins. It's a mobiliser of mercury, but not a true chelating agent. But if it works for some? That is great. I'd advise caution based on some experiences.

However, what you're getting may be a mercury rash, or even toxins/candida. Hives are actually often a healing reaction. This is not unheard of, especially when you are using something that is encouraging toxin elimination via the skin and causing "healing flare ups". The chlorella is very potent, contains many healthy things and could cause flare ups of yeast/toxins and movement of them, which may account for what you're experiencing.

It "could" be allergy, but I would say it's probably toxins moving and possibily coming out which seems to be an allergic reaction.

So long as your body is able to eliminate what the chlorella is pushing around, you may get away with it. Some people don't because their system is too poisoned, too sensitive and they may have a blockage somewhere that is not allowing them to excrete what has been mobilised.

ONe way of possibly finding out if this is toxins coming out, is to have a hot bath, or something that heats you up and causes you to sweat. Usually this will exacerbate those kinds of rashes as the toxins erupt to the surface of the skin.

ARe you taking anything else to help you? Like vitamin C? Vitamin E? B complex? You need a good lot of antioxidants to help your body cope during this.

You can also have hot baths (not too hot to where you can't cope), contain a cup or so of epsom salts (or you can use sea salt and baking soda (cup each), as this encourages toxin elimination via the pores of the skin.

Just be careful on the chlorella and good luck.