Styes are acute inflammations of oil glands in the eyelids caused in part by bacteria from the skin. They are similar to common acne pimples that occur elsewhere on the skin. More than one stye may occur at the same time.

Styes usually develop over a few days and may drain and heal on their own. Sometimes, however, the immune response may kill the bacteria but leave behind a chronic lipogranuloma, called a chalazion.

• Painful swelling on the eyelid
• Tearing of the eye
• Foreign body sensation
• Sensitivity to light
• Eye pain

A physical examination of the eyes and eyelids confirms the diagnosis. Special tests are usually not necessary.

Styes can be treated by applying warm compresses for 10 minutes 4 times a day. Do not attempt to squeeze the stye; let it drain on its own.

Antibiotic creams are sometimes used for recurrent or persistent styes. Some styes need to be lanced to drain the infection.

Styes often resolve on their own or they may recur. The outcome is excellent with treatment.

• Recurrence of stye
• Spread of infection to other eyelash follicles
• Spread of infection to the tissue of the eyelid (eyelid cellulitis)

Call for an appointment with your health care provider if lumps on the eyelid continue to enlarge or do not clear up on their own within a week or two.

Wash hands thoroughly before touching the skin around the eye. Careful attention to cleaning excess oils from the edges of the lids may help prevent styes in people who are susceptible to them.