Mr. Onur Gilleard
Qualifications & Experience
Mr Onur Gilleard is a distinguished consultant plastic surgeon on the GMC specialist register. He previously held an NHS consultant post at St Bartholomew’s Hospital in London, specialising in skin cancer and microsurgical reconstruction. In 2021, Mr Gilleard transitioned from the NHS to dedicate himself fully to private practice, allowing him to focus exclusively on providing personalised, high-quality care to his patients. He is recognised as an expert in laser treatments, having conducted research and developed advanced treatment protocols using cutting-edge laser technology to optimise both clinical outcomes and cosmetic results.
Get started today
Book a Consultation
The quickest way to tell them apart: a stye is a sudden, painful, red swelling right at the lash line, caused by an infected gland, while a chalazion (eyelid cyst) is a firmer, usually painless lump deeper in the body of the eyelid, caused by a blocked oil gland. Both often start with warm compresses, but a stye behaves like an infection and settles within days, whereas a chalazion can linger for weeks and may need a minor procedure if it does not clear. Here is how to recognise each and what to do.
The Key Differences
| Stye | Chalazion | Cyst of Zeiss | |
|---|---|---|---|
| Speed of arrival | Overnight to days | Weeks, slowly | Weeks, slowly |
| Pain | Tender, often throbbing | Usually painless | Usually painless |
| Position | At the lash line | Deeper, in the lid body | At the lash line |
| Nature | Infection | Blocked oil gland (no infection) | Blocked lash-follicle gland |
| First move | Warm compresses; usually settles itself | Compresses for a few weeks, then assessment | Leave alone; assess if persistent |
| Stye | Chalazion (eyelid cyst) | |
|---|---|---|
| Cause | Infected gland or follicle | Blocked oil (meibomian) gland |
| Pain | Painful, tender | Usually painless |
| Position | At the lash line, near the edge | Deeper in the body of the eyelid |
| Onset | Sudden, red, may have a yellow head | Slower, a firm lump |
| Course | Usually settles within days | Can persist for weeks |
The two are related: a stye can sometimes leave a chalazion behind once the infection has gone. A chalazion is not itself an infection, which is why antibiotics alone do not usually clear it. The full removal route is in our guide to chalazion removal.
Why the Distinction Changes What Happens Next
It is not an academic label. A stye is an acute infection of a lash follicle and it behaves like one — painful, fast, and usually settling with warm compresses. A chalazion is a blocked, sterile blockage of a meibomian gland; it is firm, often painless, and slower, and warm compresses frequently do not shift it.
The practical consequence: antibiotics are not the answer to a chalazion, because there is no infection to treat. When a chalazion persists, what resolves it is drainage or excision rather than another course of tablets. That is the same principle that applies to cysts elsewhere on the body — inflamed does not mean infected, and treating the wrong one wastes weeks.
What to Do for a Stye
A stye usually clears on its own. Apply a warm compress to the closed eye several times a day to bring it to a head and help it drain, keep the eyelid clean, and avoid squeezing it or wearing eye make-up and contact lenses until it settles. See your GP or pharmacist if it is very painful, affecting your vision, or not improving after a few days, as occasionally a short course of treatment is needed.
What to Do for a Chalazion
Start the same way, with warm compresses and gentle massage over a few weeks, which clears many chalazia. If it does not settle, becomes large enough to blur vision or to be unsightly, or keeps coming back, it can be removed with a quick incision-and-drainage procedure under local anaesthetic, done from the inside of the eyelid so there is no visible scar. Whether and when that is worthwhile is covered in can eyelid cysts go away on their own?
The Third Player: Cysts of Zeiss and Moll
Between the classic stye and the classic chalazion sit two lesser-known lash-line lumps. A cyst of Zeiss is a blocked oil gland at the base of an eyelash — small, rounded, non-tender, sitting right at the lid margin; a cyst of Moll is its watery cousin, a tiny translucent sweat-gland cyst in the same neighbourhood. Neither is an infection, neither responds to antibiotics, and — despite what search data tells us people type — neither should be removed at home: they sit millimetres from the eye surface. Persistent ones are removed in minutes under local anaesthetic, exactly like a chalazion.
When to See a Specialist
See someone promptly if the lump is painful and rapidly worsening, if there is spreading redness or swelling, or if your vision is affected. And a lump that keeps coming back in exactly the same spot, or that looks unusual, should always be assessed rather than simply treated again, because a small number of persistent eyelid lesions need a closer look.
Stye or Cyst? Reddit’s Favourite Argument, Settled
“Painful and appeared overnight — stye or chalazion?”
Speed and pain vote stye: acute, tender, at the lash line, often with a tiny head. A chalazion is the slow, firm, painless one deeper in the lid. The overnight painful lump usually earns compresses and patience; it is the painless one still there in month two that earns a procedure.
“My stye ‘turned into’ a hard ball that won’t leave. Did it become a cyst?”
Effectively, yes — this is the classic sequence. The infection of a stye settles, but the gland stays blocked and the residue organises into a chalazion. It is not dangerous, but it is also unlikely to vanish now: firm, months-old chalazia are the textbook candidates for the few-minute removal.
“Castor oil cured my stye in two days, so why do doctors dismiss it?”
Because most styes cure themselves in a few days — whatever was applied gets the credit. Warm compresses genuinely help both styes and chalazia; the oil is a garnish, and anything applied that close to the eye needs to be safe for the eye surface, which undiluted essential oils are not.
Common Questions
- Can a stye turn into a cyst?
- In practice, yes: when a stye’s infection settles but the gland stays blocked, the leftover material can organise into a chalazion — a firm, painless lump that persists. This is one of the commonest chalazion origin stories, and once formed it behaves like any chalazion: compresses first, a short procedure if it will not budge.
- How do I know if it is a stye or a chalazion?
- A stye is a sudden, painful, red swelling at the lash line; a chalazion is a firmer, usually painless lump deeper in the eyelid. A stye behaves like an infection and settles in days, while a chalazion can linger for weeks.
- Will antibiotics clear a chalazion?
- Not usually, because a chalazion is a blocked gland rather than an infection. Warm compresses help, and a persistent chalazion is treated with a minor incision-and-drainage procedure.
- Can a stye turn into a chalazion?
- Yes. After a stye settles, it can sometimes leave a firm, painless chalazion behind in the eyelid, which is then managed as a chalazion.
- What are cysts of Zeiss and Moll?
- Two smaller lumps that sit alongside styes and chalazia. A cyst of Zeiss arises from an oil gland at the base of a lash; a cyst of Moll from a sweat gland at the lid margin. Both are benign, and both are removed the same way when they warrant it.
- How often does a chalazion come back after drainage?
- Roughly one in ten recurs. A single recurrence is within the normal range and is usually simply drained again. What changes the approach is a second recurrence in exactly the same spot — at that point the lesion is examined rather than drained again.
- Will removing an eyelid cyst leave a visible scar?
- Usually not. The incision is normally made on the inner conjunctival surface of the lid, so there is no external scar and no stitches. An external incision is occasionally necessary, and dissolvable stitches are used in that case.
If it reaches that point, eyelid cyst removal at our Harley Street clinic is a same-day procedure under local anaesthetic.
Some lumps should not wait at all — the warning signs are in when an eyelid lump needs to be seen urgently.
Share this Post
