I was diagnosed with AF in 2000 and eventually had a successful cardiac ablation in 2011. At a similar time I was diagnosed with Mucous Membrane Pemphigoid (MMP) which is basically an incurable autoimmune blistering disease. I have just been put on Mycophenelate (I have been resisting this and/steroids) for ages but the blisters were going down my throat. I have been AF free since the ablation but now it has suddenly started again. It might be the heat (but I am used to heat) so am putting it down to the Mycophenelate. Has anyone come across this before?