There are secretory glands inside the eyelids that produce oily material and have openings at the lid margin (edge is where the eyelashes grow out). If the gland becomes inflamed and its opening clogged, the oily material accumulates inside the gland and will cause irritation and inflammatory reaction in the surrounding tissues, leading to painful swelling, redness, and a bump in the eyelid. This is called Chalazion. The role bacteria of the eyelids play in chalazion is not clear. This condition is not uncommon in diabetics, contact lens wearers and blepharitis. Treatment of this condition consists of hot compresses, anti-biotics (eye drops or pills) and anti-inflammatory agents, which will resolve the swelling of the eyelid in many cases at the onset of the disease. However, sometimes the bump on the lid will not go away and develop into a hard cyst, which surgical incision and emptying the infected and oily material will remedy. This surgery is considered minor and can be done in the office. The eye will be patched for a day and patients can resume their routine activities the following day.