What is the difference between a sty and chalazion?

Sty:

- A stye is a small, red, painful bump on the edge of the eyelid.

- It is caused by a bacterial infection of the oil gland in the eyelid.

- Styes usually resolve on their own within a few days.

- Treatment may include warm compresses, antibiotic ointment, and pain relievers.

Chalazion:

- A chalazion is a small, hard bump on the eyelid.

- It is caused by a blocked oil gland in the eyelid.

- Chalazia are usually painless and do not cause any vision problems.

- Treatment may include warm compresses, massage, and steroid injections.

- If a chalazion does not resolve on its own, it may need to be surgically removed.