Meibomian Gland Dysfunction (MGD): Symptoms, Causes and What Helps

By Nizam Diveli, registered optometrist and founder of BlinkBetter

Meibomian gland dysfunction (MGD) means the tiny oil glands along the edge of your eyelids aren't releasing enough good-quality oil. Without that oil your tears dry out too quickly, so your eyes feel gritty, burning and tired, and your vision can blur until you blink. It's one of the most common reasons for dry, uncomfortable eyes. For most people it's kept under control with a daily routine of warmth, gentle massage and lid cleaning.

Not sure what's going on with your eyes? Try our free eyelid symptom checker. It takes about a minute.

What are the meibomian glands?

Each eyelid holds a row of small oil glands, set inside the firm plate of the lid, with tiny openings just behind your lashes. Every time you blink, a little of their oil (called meibum) is squeezed out and spreads across the surface of your tears (TFOS MGD workshop).

That thin oily layer works like a lid on a cup of tea: it slows evaporation and keeps the watery tears where they should be. When the glands work well you never notice them. When they don't, the tear film breaks up quickly and the front of the eye starts to dry out between blinks.

What is MGD?

Meibomian gland dysfunction is a long-term change in how these glands work. Most often the openings become blocked, or the oil turns thick and cloudy instead of clear and runny, so less of it reaches the eye. An international expert workshop describes it as a chronic problem affecting most of the glands, usually involving blocked ducts and a change in the quantity or quality of the oil (TFOS).

You'll often see MGD described as posterior blepharitis, because it affects the back edge of the eyelid. The College of Optometrists notes that MGD is the most common cause of posterior blepharitis (College of Optometrists).

MGD symptoms

MGD can be surprisingly uncomfortable for something you can't see. Common symptoms include:

• eyes that feel gritty, sandy or like there's something in them
• burning or stinging, often worse later in the day
• blurry vision that clears when you blink
• eyes that feel tired or heavy, especially after screen work or reading
• watery eyes. This sounds odd for a "dry eye" problem, but irritated eyes make extra watery tears that don't stick to the surface
• red, thickened or rounded eyelid edges, sometimes with tiny visible blood vessels
• discomfort that's worse in wind, air conditioning or central heating

Symptoms often come and go, and can be worse when the air is dry (nidirect). Early on, some people have signs of MGD that an optometrist can see before they notice any symptoms at all.

MGD, blepharitis or dry eye: what's the difference?

These three overlap a lot, which is why they get confused. A simple way to think about it:

	Where the problem is	What you tend to notice
MGD	The oil glands at the back edge of the lid	Gritty, burning, blurring that clears with blinking
Anterior blepharitis	The front of the lid, around the lash roots	Crusts, flakes and itchy lid edges
Dry eye	The tear film on the surface of the eye	Dryness, discomfort and tired eyes. MGD is a very common cause

Many people have more than one at once. If yours feels mainly crusty and flaky, start with our blepharitis guide too.

What causes MGD?

There's rarely a single cause. Things that make it more likely include:

• Age. The glands tend to produce less, and lower-quality, oil as we get older.
• Hormonal changes, including around the menopause. The glands are sensitive to sex hormones (TFOS).
• Screens and concentration. We blink less, and less completely, when focusing, so the glands are squeezed less often.
• Contact lens wear.
• Eye make-up, especially eyeliner along the inner rim, which can sit over the gland openings. Old make-up makes symptoms worse (Sherwood Forest Hospitals NHS).
• Skin conditions such as rosacea and seborrhoeic dermatitis, which often go hand in hand with MGD (NHS Scotland eyecare guidelines).
• Some medicines, for example certain acne treatments. Don't stop any medicine without speaking to your GP.
• Anterior blepharitis or Demodex mites at the lash line, which can add debris and inflammation around the gland openings.

How to manage MGD at home

MGD is long-term, so the aim is a routine you can actually keep up, much like brushing your teeth. NHS guidance for lid problems like this is built on three steps (nidirect, Moorfields):

1. Warm. Hold something warm (not hot) over your closed eyes for about 5 to 10 minutes. The warmth softens the thickened oil so it can flow. It needs to stay warm for the whole time; a flannel cools within a minute or two, so re-warm it or use a heat mask.
2. Massage. Straight after warming, gently press and roll your fingertip along the lids towards the lashes: downwards on the upper lid, upwards on the lower lid. This helps squeeze the softened oil out of the glands. It should feel firm but never painful.
3. Clean. Wipe along the lash line to clear away the oil and any crusts, so the openings stay clear. Our step-by-step lid cleaning guide shows exactly how.

Do this once or twice a day while symptoms are bad, then once a day to keep things under control. It usually takes a few weeks of doing it consistently before you notice a real difference, and symptoms tend to come back if you stop.

Other things that help:

• Take regular screen breaks and make a point of blinking fully, closing your eyes completely.
• Keep eye make-up off the inner rim of the lid, take it off fully every night, and replace eye products regularly.
• Lubricating eye drops can ease symptoms. If you use them often, preservative-free drops are usually kinder to the eye (NHS Scotland).
• Try to avoid sitting in the direct flow of fans, car vents or heaters.

What helps with MGD

You can do the whole routine with a bowl of warm water and a flannel. Products just make it quicker and easier to stick with, which is what matters most for MGD.

• For the warm step: our SelfHeat eye mask is designed for this. It warms up on its own, with no microwave, and holds its warmth far longer than a flannel.
• For the clean step: our BetterScrub eyelid wipes are a UKCA-registered medical device for eyelid hygiene, with a soft side and a textured side for the lash line. If you'd rather cleanse at the sink, our Eyelid Cleansing Foam is designed to gently cleanse the lids and lashes.
• For comfort overnight: our BetterLids eyelid ointment is a UKCA-registered medical device that keeps dry, sore lid edges comfortable while you sleep.

You'll find the whole routine in our MGD collection.

Treatments your optometrist might suggest

If the daily routine isn't enough after a few weeks, it's worth booking an eye examination. An optometrist can look at your lid margins and glands under magnification, check how quickly your tears break up, and gently press the glands to see what the oil looks like. Depending on what they find, options include:

• clearing the glands in clinic, by pressing out the blocked oil
• a course of antibiotic ointment or drops for the lid edge, or a longer course of low-dose antibiotic tablets for stubborn cases. These work partly by calming inflammation in the glands (nidirect, College of Optometrists)
• a short course of anti-inflammatory drops, usually under specialist supervision
• in-clinic treatments offered by some practices, such as heated gland treatments (thermal pulsation) or intense pulsed light (IPL) for the lids. Availability and cost vary, and these are usually private.

Evidence for omega-3 supplements is mixed, so ask your optometrist whether they're worth trying for you rather than assuming they'll help.

Can MGD cause other problems?

MGD itself isn't usually serious, but it's a common driver of ongoing dry eye. It can also make styes and chalazia (small, painless lumps in the lid caused by a blocked gland) more likely. Untreated, long-standing MGD can lead to some glands shrinking and stopping working, which is one reason it's worth starting a routine early rather than waiting for it to get worse.

When to see an optometrist or GP

Book an appointment with an optometrist if:

• your symptoms haven't improved after 3 to 4 weeks of a daily routine
• you keep getting lumps or styes on your eyelids
• your eyes are uncomfortable enough to affect reading, screens or driving

Get help the same day (an optometrist, your GP, NHS 111, or A&E if out of hours) if you have:

• a painful red eye
• sensitivity to light
• a change in your vision that doesn't clear when you blink
• swelling or redness spreading across the eyelid or face

These aren't typical of MGD and need checking promptly (nidirect).

Frequently asked questions

Can MGD be cured?

Usually not completely. It's best thought of as a long-term condition that you manage, like dry skin. The good news is that most people get good control with a daily routine and, when needed, treatment from an optometrist.

How long does it take for warm compresses to work?

Expect a few weeks of daily use before you feel a clear difference. The key is warming for long enough (around 5 to 10 minutes) at a steady, comfortable warmth, followed by massage.

Is MGD the same as dry eye?

Not quite. Dry eye describes the tear film problem; MGD is one of its most common causes. Many people with dry eye symptoms have MGD underneath.

Can I wear eye make-up with MGD?

Yes, with care. Keep liner off the inner rim (the waterline), remove make-up fully every night, and replace eye products regularly.

Can I wear contact lenses?

Often yes, but MGD can make lenses less comfortable. Speak to your optometrist, who may adjust your lens type, wearing time or cleaning routine.

Do the glands recover?

Blocked glands can often start working better once the oil is softened and cleared regularly. Glands that have shrunk over many years are less likely to recover, which is why starting early helps.

The short version

MGD means the oil glands in your eyelids aren't doing their job, so your tears dry out too fast. Warm, massage and clean your lids every day. Give it a few weeks, cut down on things that make it worse, and see an optometrist if it isn't improving or if you have pain, light sensitivity or a change in vision.

This guide is general information, not a diagnosis. If you're worried about your eyes, see an optometrist.