Weird tingling when top of foot is exfoliated (i.e. during a pedicure)?

Has anyone ever experienced this, or can anyone guide me towards an explanation?

This happens to me every time I get a pedicure and the top of my foot is rubbed, usually with sea salts or some other type of exfoliant. The area on my foot I think is about the upper middle of the foot towards the outer edge. I get this really strange twinge in a nerve around my collarbone opposite of the foot that is being exfoliated. So when my right foot is getting it, I feel the twinge on my left collarbone area. Left foot, right collarbone area. It’s a pretty unpleasant sensation, and sometimes it gets to the point where I have to put pressure on it so the sensation is bearable because I do like getting my feet rubbed, massaged, and exfoliated. When I do put pressure on it, it’s not as “painful” (although I wouldn’t classify the feeling as “pain”, but like I said, it’s not a pleasant feeling) and I think I can kind of feel some kind of “bubbling” going on with the nerve.

I’m a believer in reflexology and whatnot, but this particular phenomenon is irritating and I always wonder exactly what it is and if it means there’s anything wrong with me.