Causes of a stye eye infection: what to know

The eyelid contains tiny glands that help keep the eye surface comfortable. If an opening becomes blocked, oil and skin debris can collect, causing a tender lump. Irritated skin around an eyelash can also become inflamed. Touching the eye with unwashed hands, old eye makeup, or shared cosmetics may introduce germs, but a stye is not proof that someone has poor hygiene.

Some people notice repeated styes when the eyelid margins stay irritated or oily. A recurring lump may also be a different type of blocked gland. The cause cannot always be identified from appearance alone, especially when swelling is not tender.

Warm the closed eyelid with a clean compress for several minutes, then gently wipe away loosened crusting with clean water. Wash hands before applying anything near the eye. Keep cosmetics and lenses away while the lid is inflamed, and replace products that have touched the affected eye if advised by a clinician.

Never squeeze the lump. Avoid sharing towels, pillowcases, eye products, or applicators. If styes recur, ask a clinician to review eyelid care and any ongoing skin or eyelid inflammation rather than repeatedly treating each lump on your own.

Arrange prompt care if redness or swelling spreads, pain becomes severe, vision changes, light is painful, or moving the eye hurts. Fever or feeling generally ill can signal a problem that needs quick assessment rather than home care alone.

See a GP if the lump persists, repeatedly returns, drains continuously, or does not resemble your previous styes. Assessment can clarify whether a blocked gland, eyelid inflammation, or another eye condition is responsible.

Ask whether the lump is centred on an eyelash or gland, whether your eyelid margins show irritation, and how to clean them safely. Ask what products to pause, whether recurring episodes need further assessment, and which warning signs should lead to urgent care.