A chalazion is similar to a stye but tends to be less painful and deeper in the eyelid.
What it looks like
Smooth, round lump
Usually painless
Develops slowly over days or weeks
May slightly blur vision if large
Why it happens
A blocked oil gland inside the eyelid. Sometimes it develops after a stye heals.
Typical course
It may take several weeks to disappear, though warm compresses can help.
3. Milia
Milia are tiny, harmless cysts that often appear around the eyes in infants and children.
What they look like
Very small white bumps
Firm and pearly
Usually painless
Not inflamed
Why they happen
Milia form when dead skin cells become trapped under the skin.
Typical course
They usually disappear on their own within weeks or months.
4. Insect Bite or Allergic Reaction
Sometimes eyelid swelling is caused by something simple like a mosquito bite or mild allergy.
What it looks like
