Chalazion removal: when it is drained and what the procedure involves

A chalazion is drained or injected only when warm compresses and lid hygiene have not settled it, when it presses on the eye, or when it keeps coming back. Most are managed first without a procedure. When one is treated, the choices are incision and curettage (opening the lump and scraping out its contents) or an injection of steroid into it, and trials show both work in most people. A lump that returns in the same place needs a tissue sample to be sure it is a chalazion.

What is a chalazion, and how is it different from a stye?

A chalazion (kalazion in Malay, also called ketul pada kelopak mata, a lump on the eyelid) is a chronic, sterile lump caused by inflammation of an oil gland in the lid. It is not an infection. StatPearls describes it as a chronic sterile lipogranuloma, typically slowly enlarging and non-tender. A deep chalazion arises from a meibomian gland inside the tarsal plate, the firm plate in the lid, and a superficial one from a gland of Zeis at the base of a lash. It is typically benign and may settle on its own.

A stye, the medical name for which is hordeolum, is different: an acute, usually bacterial, infection of a lash follicle or an oil gland. The American Academy of Ophthalmology says a stye is very painful, often at the lid edge and sometimes swelling the whole lid, while a chalazion is not usually painful and sits farther back on the lid. The NHS makes the same point: a hard lump that is not very painful is more likely a chalazion. A stye can leave a chalazion behind. I cover the lump itself in my chalazion and stye guide and the infection in the article on how long a stye lasts.

What is the first treatment for a chalazion?

Warm compresses and lid hygiene come first. The AAO advises soaking a clean cloth in hot water and holding it to the lid for 10 to 15 minutes, 3 to 5 times a day, keeping the cloth warm, and being careful not to burn the skin. For a chalazion, the warmth helps the clogged oil gland open and drain, and gentle massage around the lump with a clean finger can help the gland clear. The NHS gives a shorter schedule for a stye, 5 to 10 minutes, 2 to 4 times a day.

Two things to avoid: squeezing or trying to burst the lump, which can spread infection into the lid, and wearing eye make-up or contact lenses while it is active. Blepharitis (inflamed lid margins), rosacea, seborrhoeic dermatitis and diabetes make a chalazion more likely, so treating the lid margin is part of the plan. The blepharitis article explains the daily routine. The NHS advises seeing a GP if a lump has not improved within a few weeks.

When is a chalazion drained or injected?

When it has not settled with home care, when it affects vision, or when it is large, red and swollen. The AAO says a very swollen chalazion may be given a steroid shot to reduce the swelling, and that one that affects vision or does not go away may be drained, in the ophthalmologist's office under local anaesthesia.

Two pieces of research are worth knowing. A randomised trial of 94 patients with primary chalazia that had failed conservative treatment compared an injection of triamcinolone (a steroid) with incision and curettage. Complete resolution was achieved in 33 of 42 patients (79%) after incision and curettage and in 42 of 52 (81%) after the injection, with no significant difference (P=0.8). The average time to resolution after injection was 5 days, 92% needed only one injection, and white steroid deposits were seen in 11.5% and cleared on their own. There were no complications such as lid depigmentation, raised eye pressure or vision loss in either group. The authors concluded injection may be an alternative first-line treatment when the diagnosis is straightforward and no biopsy is needed.

A later meta-analysis pooled eight randomised trials between 1984 and 2013. Steroid injection succeeded in 60.4% of 288 patients with one injection and 72.5% with one or two, while incision and curettage succeeded in 78.0% of 264 patients with one procedure and 86.7% with one or two. The authors concluded incision and curettage was more effective with one procedure, that the difference shrank when a second attempt was allowed, and that the studies showed no difference in complications. The results of the individual trials varied widely, so which is better for one lump depends on its size, position and the surgeon's judgement.

What does chalazion removal involve?

Incision and curettage is a small procedure done under local anaesthesia, which numbs the lid. Curettage means scraping: the surgeon opens the lump and clears out its contents, and the thickened oily material comes out. It is usually done from the inside of the lid when the lump points inward, so that the skin is not cut, but the route depends on where the lump sits. This is general information and the surgeon explains the exact plan.

An injection is quicker: a small dose of steroid is placed into the lump, and the trial above reported an average of 5 days to resolution. The 94-patient trial looked for lid depigmentation (loss of skin colour), raised eye pressure and loss of vision, and found none; the only finding was the white deposit, which cleared by itself. Aftercare, including how long to keep using warm compresses, is given by the surgeon who treats you.

Can a chalazion come back, and when does it need a biopsy?

It can come back, and a lump that returns in the same place needs a tissue sample. StatPearls states that recurrent chalazia should be evaluated for malignancy. The AAO says that if a stye or chalazion keeps coming back, the ophthalmologist may take a tiny sample of tissue, a biopsy, to see whether a more serious problem is behind it.

The reason is sebaceous carcinoma, a rare cancer of the oil glands in the lid. A 21-year Finnish series of 32 patients found a median diagnostic delay of 12 months. Misdiagnosis caused the delay in 72%, and a chalazion was the wrong label in 34%. Of 30 preoperative biopsies, 12 (40%) did not give the correct diagnosis, which is why the authors urge informing the pathologist that a cancer is possible. Sebaceous carcinoma was rare, at 0.6 per million people in that country. The median age was 74 and 72% were women, so it mostly affects older adults. The article on a lump that will not go away and the page on eyelid skin cancer warning signs explain what to watch for.

Recurrence also depends on the lid. In a small trial of 50 people aged 15 to 45 with multiple chalazia, those who had incision and curettage alone saw the swelling go within an average of 4.4 days, but 11 of 25 developed a chalazion again in the same lid within six months. Those who had the injection added did not, although they took about 6 days to settle. It is a small study from a single clinic, so it cannot settle the question, but it shows why recurrence is part of the discussion.

Dr Catherine Chow begins consulting at Eagle Eye Centre Malaysia, Petaling Jaya, from early 2027. Until then, a chalazion that has not settled, presses on the eye or keeps returning should be looked at by an ophthalmologist. Get urgent help for severe pain, spreading redness, pus or a change in vision, as the NHS advises. For the wider group of lumps, see the lumps and lashes section, and my hub article on why eyes look tired.