Yes, I have those prickling feelings too. I am taking gold coin grass after chanca piedra herb. When I dring the gold coing grass in the morning soon I feel the prickling, like twinges. I don't know what is happening, but it is not like an attack. That was more like a giant swelling pain, like I was going to explode. We can only guess, but it feels like it is a good thing. I have done two cleanses (Clark method) Sometimes the oil makes me feel those prickles too.
Good Luck, Lynn