Inside my eyelid, there is aa really small red pimple. How do I get rid of it?

Sty / chalazion . It could be a small sty or accumulation of fatty substance in the eye lid, since it is small, it might resolve spontaneously, you can apply warm compresses several times a day but if it gets bigger or is painful, see your 1ry care physician or an ophthalmologist. Good luck .