I've never used big1, but I have used t-gel and have never had any burning with it. Even after being on my current cycle for 3 weeks, I have no skin irritation, at all, in the areas I have been applying the t-gel. Are you using 1t in the t-gel? I've only used 4ad in it so far. Some people have a reaction to transdermal 1t, but I think it's usually itching, hives, etc. Not burning.