I have a stye INSIDE my eyelid,,?

its inside the lower lid. in the middle of my eye. its too far away from eyelash follicles too be an infection from that.. its in the red membrane if you pull my lower eyelid down.i cant see it from the outside.(but i can feel the bump if i put my finger on the outside) the reason i even noticed it was because it looked like there was a "pouch" on the outsidel lower lid farther down.theres a whitish head on it like a stye. i just thought it was an odd place. no oil glands..no eyelashes...any ideas?