A chalazion is a red raised mass that can gradually or suddenly appear in the upper or lower eyelid. It is caused by a blockage of the oil produced by your eyelids oil glands. As this oil builds up, it forms a visible lump within the eyelid. This causes an inflammation that in turn causes symptoms including swelling, redness, mild pain, and leaves the area feeling tender.
Chalazions more commonly affect adults, frequently those between the ages of 30 to 50 years old. People are more likely to develop a chalazion if they suffer from chronic blepharitis, adult acne (acne rosacea).
While a chalazion sometimes will naturally dissipate after 3 weeks to 1 month, it can also persist causing continuous discomfort or even blur vision as the lump begins to press against the eyeball.
Chalazion removal is a simple, painless procedure which can be completed in 15 minutes and is performed on an outpatient basis.