<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have a red and swollen bump on my eyelid, and its causing me a lot of pain. Theres also some abnormal appearing skin around it. Can you tell me whats happening?  <response>: Based on your symptoms, it sounds like you have a stye. Its a common infection of an oil gland on the eyelid that causes redness, swelling, and pain. We can treat it with warm compresses and sometimes antibiotics if necessary. 