But it can be painful with a reddened swelling that causes much anxiety. A sty is a localised infection in the glands within the eyelid. It can occur externally and manifest as a tender red nodule ...

A stye is a red bump that forms on the eyelid and can look and feel like a big pimple. This bump often feels swollen and painful to the touch. Styes are basically like acne that occurs on the ...

This is because the sty can prevent the eyelid's oil glands from draining. Related: Bump on the Eyelid Chalazia and sties can ...