Styes can form on the outside (external) or inside (internal) of your eyelid. External styes are more common than internal styes. Most external styes start in an eyelash follicle, but may also ...

But unlike with pink eye, a stye is often accompanied by a pimple-like bump on the eyelid. This bump can also occur inside of the eyelid, causing swelling and redness on the external part of the eye.

Source: Focus Medica. A small red, painful lump in the edge of the eyelid. Stye is usually caused by bacterial infection. It may be present inside or outside the eyelid on one or both eyes and is ...