A chalazion is a localized inflammatory response involving sebaceous glands of the eyelid that occurs when the gland duct is obstructed. A chalazion may resolve spontaneously or with warm compresses, lid scrubs, and lid massage. When there is no improvement, the chalazion may be excised.
After local anesthesia, a chalazion instrument is put in place and an incision is made in the inner aspect of the eyelid. The contents of the chalazion are then carefully drained with a curette followed by gentle pressure or heat cautery to control any bleeding.
A chalazion can develop and you might not see any symptoms. When there are symptoms, they can include:
a bump on the eyelid, sometimes becoming red and swollen. Occasionally it can be tender.
rarely, an entirely swollen eyelid
blurry vision, if the chalazion is large enough to press on the eye.