A stye is caused by infection of a gland at the base of an eyelash. It generally causes a lump at the margin of the eyelid, that is inflamed and often painful. Styes are usually caused by ...

The most common causes of new eyelid swelling include allergies, pink eye, and styes, but skin infections, thyroid disease, and herpes are other possible causes. See your healthcare provider for ...

Consult a medical professional for advice. 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 ...