So weird! Simultaneous pain in big toe and stomach!

The phenomena is called Referred Pain. http://en.wikipedia.org/wiki/Referred_pain. The most famous referred pain is:the case of ischemia brought on by a myocardial infarction (heart attack), where pain is often felt in the neck, shoulders, and back rather than in the chest, the site of the injury.http://en.wikipedia.org/wiki/Trigger_point is a fully scientific (though young) therapy modality which makes heavy use of the map of referred pain patterns.

Something like that occurred to me, Lobster, but I didn't know anything about it. Thanks for the info and the link.

oops, I spelled it wrong; should be "dermatomes"!

Yep, you probably are having a back spasm or have a slipped disc or something that occasionally irritates the nerve. This happened to me when I had back problems--I would get pain down my leg to my toe, and also feel like a hot, electrified wire was wrapped around my waist.

No back, problems, Elizeh, and I've been experiencing it as long as I can remember.

I have the same (or a similar) thing from time to time, on my right side. I assumed what LobsterMitten found, that the areas are served by the same nerve, and some random physiological process or spasm or whatever else causes random pains occurred in that nerve, causing me a short pain or twinge in both those areas. There are other feelings that make the seemingly nonadjacent coverage of nerves obvious - sometimes stretching wrong will mirror a pain in my upper arm to my wrist. The feelings that come with certain emotions sometimes spread out from my chest, then jump to my hands before they reach my shoulders. It think it's nothing more to worry about than any other random twinge or brief pain, it just happens to be along a shared nerve.

I sometimes get a muscle twitch in my right thigh (near the surface and visible) that without fail comes with a twitch in my right ear, inside, that I guess make the ear drum sort-of flap or crinkle? Anyway, I can hear the ear twitch because of the way it moves the hearing apparatus. It's annoying as fuck, and it's been going on since I was at least six years old. I remember rubbing at the twitchy bit of thigh and an adult said, leave it alone, it'll stop on its own, and I replied, I can't, its making my ear hurt, and the adult reponded with fairly impolite disbelief. No idea at all what causes it, but it happens to me too!

A friend who knows a lot about anatomy once told me that nerves in the abdomen are closely packed and signals can sometimes get crossed. She told me this after I ended up in the emergency room over an appendix scare that was on the wrong side. She said the pain signals can manifest some place close by the actual problem. Perhaps this phenomenon is part of the issue. I think everyone has this sort of thing happen to some degree. Get ready for some TMI: when I have sore nipples from PMS, I get a sympathetic ache in my top back molars. Go figure.

An acupuncturist might have an explanation.