During my tDCS treatment last evening I placed one of the electrodes near a cut on my forehead. It did not occur to me that this would be problematic since the electrode was not on the cut.

As a result the area became a bit swollen and I developed a rash. Protocols typically warn agains placing electrodes on cuts or abrasions. Based on my experience be advised that electrodes should be kept away from cuts and abrasions as well.

Hope this helps someone!