Stye

A stye is a small, painful lump on the eyelid. They're common and should go away within a week. Styes are rarely a sign of anything serious, but may be painful until they heal.

Symptoms of a stye

The stye is a round, slightly red lump on the upper lid by the eyelashes. The rest of the eye looks normal. — A stye is a small, painful lump on or inside the eyelid or around the eye.

The stye is a yellow lump on the upper lid by the eyelashes. The upper eyelid is very swollen and red. — The skin around the stye may be swollen and red and the stye may be filled with yellow pus. The redness may be harder to see on brown and black skin.

Stye on lower eyelid. It is a round, red lump by the lower eyelashes. The rest of the eye looks normal. — Your eye may be red and watery but your vision should not be affected.

A stye usually only affects 1 eye, but it's possible to have more than 1 at a time and on both eyes.

It's probably not a stye if:

there's no lump – if your eye or eyelid is swollen, red and watery it's more likely to be conjunctivitis or blepharitis
the lump is hard but not very painful – this is more likely to be a chalazion

Stye - NHS Treatment