woodworm

Everytime I take woodworm, I feel like I am getting bitten on inside of my feet. Is this normal? Is it just my imagination?I had done the woodworm/walnut hull/cloves ab out a month ago,and same thing happened. I have a terminator zapper now, but just started on woodworm again, and feet are getting bitten again. Took 7 caps tday, after being off for 3 wks.and it started tday. anybody relate?