Pimple on eyelid: stye, chalazion or milia?

A pimple-like bump on the eyelid is most often a stye, an infection of an eyelash root or a small oil gland in the eyelid. Another common lump is a chalazion, a blocked oil gland that usually does not hurt. Tiny white bumps that never hurt can be milia. None of them should be squeezed. This guide shows how to tell them apart, how to use a warm compress, how long each one lasts, and the signs that need a doctor quickly. It is part of Skinli's guide to acne by face area.

Skinli gives general education and is not a doctor. This page names no medicine and no product. Eye problems can affect your sight, so see a doctor, an optician or a pharmacist when you are unsure.

What a bump on the eyelid usually is

MedlinePlus, the US National Library of Medicine's health site, says styes are the most common eyelid bump. It describes a stye as a red, puffy lump that resembles a pimple and often hurts when touched. The NHS says: "A stye is a small, painful lump on the eyelid. They're common and should go away within a week." The American Academy of Dermatology (AAD) says: "A boil that occurs on the eyelid is called a stye."

There are two kinds. The American Academy of Ophthalmology (AAO) calls a stye that starts at the base of an eyelash an external stye, and says it can look like a pimple. A stye inside the eyelid, an internal stye, starts in one of the oil glands there. The medical name for a stye is a hordeolum.

The other common lump is a chalazion. The AAO describes styes and chalazia as two kinds of lump that form in the eyelid or on its edge. A 2024 review calls a chalazion "one of the most common eye conditions presenting as a mass lesion of the eyelids", which means a lump in the eyelid.

Stye, chalazion, milia and other bumps

The NHS has a quick test. It says a lump that is hard but causes little pain is more likely to be a chalazion than a stye. If there is no lump at all, and the eye or eyelid is swollen, red and watery, it is more likely conjunctivitis or blepharitis.

Bump on the eyelid	How it looks and feels	What causes it	Source
Stye	A small, painful, red lump at the eyelash line or inside the lid. May fill with yellow pus	Bacteria in an eyelash root or an eyelid gland	NHS, AAO
Chalazion	A firm, swollen bump, usually painless, farther back on the lid. Can blur vision if it grows large	A clogged oil gland	AAO, MedlinePlus
Milia	Tiny white bumps that do not itch or hurt	Dead skin cells trapped under the skin	AAO
Blepharitis	Swollen, itchy eyelids with flakes or crusts at the roots of the lashes. No single lump	Bacteria on the skin, a skin condition, or eyelid glands that make too little oil	NHS
Xanthelasma	Raised yellow patches on the eyelids	Can come with age, and sometimes with high cholesterol	MedlinePlus, NHS
Contact dermatitis	An itchy rash on the lid	Something that touches the skin, such as a product	AAD

Milia. The AAO says milia are tiny white bumps that often form on the eyelids, the nose and the cheeks. People sometimes take them for whiteheads, which are a type of acne. The AAO says milia cause no itching and no pain. The AAO also warns never to squeeze milia, because they cannot be removed that way and you may scar your skin. How to get rid of milia near the eye is covered in milia under the eyes.

Contact dermatitis. The AAD says: "Because the skin on the eyelid is thinner than elsewhere, this is a common place for contact dermatitis to develop." The AAD lists itchy skin among the signs. It describes a woman who reacted to a shampoo that touched her eyelid only while she rinsed it off, and says some people react to nail polish chemicals with a rash on their eyelids.

What causes a stye or a chalazion

The NHS says: "Styes are often caused by bacteria infecting an eyelash follicle or eyelid gland." MedlinePlus explains that a stye starts when a small oil gland in the eyelid gets blocked, so bacteria can grow inside it. It compares styes to common acne pimples elsewhere on the skin.

A chalazion starts the same way but stays blocked. The AAO explains that a chalazion is a swollen eyelid bump that forms when an oil gland in the eyelid gets blocked. MedlinePlus says a chalazion often follows a stye inside the eyelid, when the gland stays blocked even after the redness and swelling have cleared.

Some skin conditions make both more likely:

• Blepharitis. The AAD says: "Your eyelids contain oil glands. When these oil glands become inflamed, it's called blepharitis." The NHS says: "Blepharitis causes swollen, itchy eyelids." It names seborrhoeic dermatitis, a skin condition, as one cause.
• Rosacea. The NHS says: "You're also more likely to get a stye if you have long-term blepharitis or rosacea." The AAO also lists rosacea and seborrheic dermatitis as risks. The ocular rosacea guide covers rosacea that affects the eyes.
• Tiny mites. MedlinePlus says Demodex, a mite that lives on human skin and is a known cause of blepharitis, can make styes worse.

How to care for a stye at home

Use a warm compress. Every source agrees on warmth. They disagree on the timing:

Source	How long	How often
NHS	5 to 10 minutes	2 to 4 times a day
AAD	10 to 15 minutes	3 to 4 times a day
AAO	10 to 15 minutes	3 to 5 times a day
MedlinePlus	10 minutes	4 times a day

The AAO's method uses a clean washcloth wet with hot water, held against the eyelid. Wet it in hot water again when it cools, and take care not to burn the skin. The AAD warns not to use water that is too hot, especially on children.

An ophthalmologist answering a reader's question for the AAO, Dr. Omar R. Chaudhary, wrote that he sees warm compresses, together with gentle rubbing of the eyelid, as the best treatment for a stye. He usually advises them two to four times a day, for 5 minutes at a time. He also advised against keeping heat on the eyelid without a break, because steady warmth widens the small blood vessels there and can make the eyelid swell more. So use the compress for set times, then stop.

There is little trial evidence behind this advice. A 2017 Cochrane review looked for trials of treatments for styes inside the eyelid and found none: "We did not find any evidence for or against the effectiveness of non-surgical interventions for the treatment of an internal hordeolum." The same review says that "In many cases, the lesion drains spontaneously and resolves without treatment". In plain words, many styes drain and heal by themselves.

Leave it alone. The NHS says: "Do not try to burst a stye or remove an eyelash yourself. This can spread the infection." The AAO says squeezing a stye or chalazion can push the infection further into the eyelid.

Skip eye makeup and contact lenses. The AAD says: "If you have a stye, avoid wearing eye makeup or contact lenses until the stye heals." The NHS gives the same advice, and adds painkillers such as paracetamol or ibuprofen for pain, with no aspirin for children under 16.

How long a stye or chalazion lasts

The sources give different times, and they keep styes and chalazia apart:

• Stye: the NHS says it "should go away within a week". The AAD says most boils and styes heal "within 1 to 3 weeks."
• Chalazion: MedlinePlus says a chalazion often goes away without treatment, and gives a month as a usual time.

The NHS advises seeing a GP if a stye does not get better within a few weeks. MedlinePlus says to contact a doctor if an eyelid bump gets worse, or is no better after one to two weeks of home care.

How a doctor treats it

A doctor confirms what the bump is by looking at it. Treatment depends on the type:

• An infected stye. The AAO says an ophthalmologist, an eye doctor, may prescribe an antibiotic. The NHS says a GP may burst the stye with a thin, sterilized needle, remove the eyelash closest to it, or refer you to an eye specialist.
• A swollen chalazion. The AAO says an ophthalmologist may give a steroid shot to reduce the swelling.
• A bump that does not go away or affects vision. The AAO says it may need to be drained in the office, with medicine that blocks pain.
• A bump that keeps coming back. The AAO says the ophthalmologist may remove a small piece of tissue for testing, called a biopsy, to look for a more serious eye problem. MedlinePlus says skin cancer of the eyelid can rarely look like a chalazion.

For a chalazion, a 2024 review of clinical trials found that "there is currently no commonly agreed treatment of choice." Doctors choose between warm compresses, eyelid cleaning, ointments, a steroid shot and minor surgery.

How to prevent styes

The NHS says you can help avoid styes by keeping your eyes clean. Its list:

• wash your face and remove eye makeup before bed,
• keep your eyelids and eyelashes clean, especially if you have blepharitis,
• wash your hands before putting in or taking out contact lenses,
• do not share towels or flannels with someone who has a stye,
• do not rub your eyes if you have not recently washed your hands.

The AAO adds two rules for eye makeup: replace it with new products every three months, and do not share it with anyone, family and close friends included. It says people who tend to get styes, chalazia or blepharitis are often advised to wash around their eyes with soaps made not to sting the eyes.

When to see a doctor quickly

The NHS says to ask for an urgent GP appointment, or contact NHS 111, if:

• a stye causes severe pain or severe swelling,
• it affects your vision,
• your eye is producing pus,
• the infection has spread to your eye or eyelid.

The NHS eyelid page adds these urgent signs: "your swollen eyelid is red, hot, painful, tender or blistered", "the pain is in your eye (not your eyelid)", your eyelid droops suddenly, you cannot open your eye, or "your eyesight changes". A high temperature, or feeling hot, cold or shivery, also needs urgent help.

A spreading infection is the main risk. MedlinePlus says the infection can sometimes spread through the whole eyelid, which is called eyelid cellulitis. The AAO says to phone a doctor at once if you suspect cellulitis in yourself or a child.

See a doctor at a routine visit if a lump keeps growing, keeps coming back, or comes with loss of eyelashes, and for any yellow patches on the eyelids. For bumps elsewhere on the face, see should you pop a pimple and what is milia.