Eye twitching: common causes, what helps and when to see a doctor

Most eye twitching is eyelid myokymia: small, repeated, involuntary contractions of the muscle in one eyelid, most often the lower lid of one eye. It is very common and almost always harmless. The usual causes are everyday ones, such as tiredness, stress, too much caffeine, long hours at a screen and dry, irritated eyes. The twitch typically fades on its own within a few days, although it can come and go for a few weeks.

A much smaller number of twitches are something else: a condition that makes both eyelids clamp shut, or a spasm that spreads across one side of the face. Those need a doctor's assessment. Here, step by step, is how to tell the ordinary kind from the rest, what helps, and the rare signs that mean emergency.

What is actually twitching

The eyelids are closed by a thin ring of muscle that runs around the eye just under the skin. In myokymia, a few bundles of its fibers fire on their own, producing a flicker or ripple that you feel clearly. It tends to come in short bursts of a few seconds, repeating on and off through the day. Why those fibers become restless is not fully understood, but the triggers are familiar.

The twitch often feels much bigger than it looks. Someone across the table may see nothing at all, or only a faint movement of the skin. Three features mark the ordinary kind:

• the eyelid flickers but does not close
• your vision stays normal
• nothing else in your face moves

If all three are true, and you are otherwise well, a twitch is very unlikely to mean anything serious.

The usual triggers

Twitching rarely has a single cause. More often several small things pile up at once, and the twitch appears at the end of a long week. The ones most often linked to it:

• Tiredness and short sleep. This is the most common trigger, and several late nights in a row are the classic setup.
• Stress, from work deadlines and exams to family worries and travel.
• Caffeine, in coffee, strong tea, energy drinks and cola. The amount that tips you over varies from person to person.
• Alcohol, and for some people nicotine.
• Eye strain from long stretches of close focus on a screen, a book or fine work, especially if your glasses are out of date or a focusing error such as astigmatism has never been corrected.
• Dry or irritated eyes. Dryness is common in people who work at screens, wear contact lenses or spend their days in heated or air-conditioned rooms. Allergies and irritated eyelid edges can add to it.
• Bright light, wind and glare, which keep you squinting.

Occasionally a medicine contributes. If a twitch began soon after you started something new, mention it to your doctor or pharmacist, but don't stop a prescribed medicine on your own.

Autumn tends to stack these up. In Kyoto, the weeks before the maples turn bring visitors, drier air and the first heaters, and plenty of people are short of sleep before the year-end rush has even begun. It would not be surprising for a lower lid to start fluttering then.

What helps

There is no instant off switch for an ordinary twitch, and it usually stops by itself. What you can do is take away the things that keep it going. Most people find that a few of the changes below, made together for a week or two, are enough.

Sleep and a calmer week

Give yourself several nights of proper sleep. It sounds too simple, but it is the change people tend to notice first. If stress is part of the picture, anything that reliably settles you, a walk, a bath, an evening away from screens, is worth trying before anything else.

Less caffeine and alcohol

Cut back for a week or two and see whether the twitch eases. You don't have to give up coffee for good. Many people find a personal limit above which the twitch tends to return.

Kinder screen habits

Take regular breaks from close work. The 20-20-20 habit is easy to remember: every 20 minutes, look at something about 20 feet (6 meters) away for about 20 seconds, and blink fully a few times. The screen break timer will remind you from a browser tab. Keep the screen at about arm's length and slightly below eye level, and make text larger rather than leaning in.

Comfortable, moist eyes

If your eyes feel dry or gritty, blink fully and often, turn heating and air-conditioning vents away from your face, and add moisture to very dry rooms. The column on dry eyes and screen time covers these habits in more detail. If you wear contact lenses, follow your wearing schedule and give your eyes some lens-free time.

Warmth, as a comfort measure

A warm compress over closed eyes for a few minutes can feel soothing in the evening. Think of it as comfort, not a cure: it does not switch off a twitch. Test the temperature on the inside of your wrist first, so it is warm but never hot, and skip it if your eye is red, sore or producing discharge. The guide to warm compresses for dry eyes covers how to use one safely.

Twitching that is not the ordinary kind

A few conditions can look like an ordinary twitch at first. They are uncommon, and a doctor needs to assess them, but the differences are easy to notice once you know what to look for.

Blepharospasm

Benign essential blepharospasm causes involuntary, forceful closing of the eyelids, usually in both eyes. It often starts with blinking more than usual, or with eyes that feel irritated and sensitive to light. Over time the lids may squeeze shut for longer, which can make reading, walking outside or driving difficult. It is more common in middle-aged and older adults, and bright light, stress and tiredness can make it worse, so it is easy to mistake for an ordinary twitch at first. "Benign" means it is not life-threatening, not that it is trivial. Effective treatments exist, usually from an ophthalmologist or a neurologist.

Hemifacial spasm

Hemifacial spasm affects one side of the face. It typically starts around one eye and, over months, spreads to the cheek and the corner of the mouth, pulling them up together. The eye on that side may close during a spasm, and the twitching can continue even during sleep. It is often caused by a blood vessel pressing on the nerve that controls the muscles of that side of the face, so a doctor may arrange a scan. Treatments are available, and your doctor will decide what fits.

Twitching with other symptoms

An inflamed eye, an eyelash rubbing against the surface or something trapped under the lid can set off twitching and extra blinking. These usually come with redness, pain, watering or the feeling that something is in the eye.

Rarely, twitching is one part of a condition affecting the nerves or brain. In those cases it almost always comes with other symptoms, such as weakness, drooping, numbness, or changes in speech, balance or vision. A twitch on its own, in an otherwise well person, is not the pattern doctors worry about.

When to see a doctor

See an eye doctor, or your regular doctor, if:

• the twitching goes on for more than a few weeks, or keeps coming back
• your eyelid closes completely with each twitch, or you find it hard to keep your eyes open
• the twitching spreads to other parts of your face, such as your cheek or mouth
• your upper eyelid droops
• the eye is red, swollen, painful or producing discharge, or your vision changes
• light sensitivity, or a feeling of something in the eye, won't go away

An ophthalmologist can examine the eye itself and tell surface problems apart from the conditions above; some people are then referred to a neurologist. If you are not sure where to start, the guide on who to ask about an eye worry can help, and common eye conditions describes the eye problems that sometimes sit behind irritation and blinking.

Call for help straight away

Call your local emergency number (such as 911, 999, 112, or 119 in Japan) if twitching or a drooping eyelid comes with any of these:

• sudden drooping or weakness of one side of the face (ask the person to smile and see whether one side drops)
• weakness or numbness in an arm or leg
• slurred or muddled speech, or trouble understanding others
• sudden loss of vision or sudden double vision

These can be signs of a stroke. Note the time the symptoms started and don't wait to see whether they pass. Sudden loss of vision in one eye is an emergency even if it comes back within minutes. A sudden painful red eye with blurred vision needs same-day care too. The guide to eye emergencies and first aid lists other symptoms that can't wait.

Questions people ask

How long does eye twitching last?

An ordinary eyelid twitch usually settles within a few days. It can come and go for a few weeks, especially while the triggers are still there. If it lasts longer than that, or any of the warning signs above appear, have it checked.

Why does only one eye twitch?

Myokymia usually affects one eyelid at a time, most often a lower lid. Twitching in both eyes together, especially when the lids squeeze shut, is more typical of blepharospasm and worth showing to an eye doctor.

Is eye twitching a sign of a stroke?

A twitch on its own is not a typical stroke symptom. Stroke signs are sudden weakness, facial drooping, numbness, trouble speaking or sudden loss of vision. If any of those appear, call your local emergency number straight away.

Can old glasses make my eye twitch?

They can add to it. Glasses that no longer match your eyes can lead to eye strain, one of the common triggers. If you have been squinting, or your last eye exam was a few years ago, an optometrist or ophthalmologist can check whether your prescription has changed.

Sources

• NHS health A to Z, pages on twitching eyes and muscles
• American Academy of Ophthalmology, eye health pages on eyelid twitching and blepharospasm