My left eyelid twitched for four days straight once. It was not painful — just a tiny, rhythmic flutter in the corner of my eye that I could not control. By day three I was convinced I had a neurological condition. I did not. I was tired, stressed, and drinking way too much coffee.

Eye twitching — the medical term is myokymia — is almost always benign. It is your eyelid muscle misfiring because of something simple and fixable. Here is what stops it.

The caffeine connection

Caffeine is a stimulant and stimulants make muscles more excitable. If your eyelid is twitching and you drink more than two cups of coffee a day, cut back for a few days. Switch to half-caf or drink one cup instead of three. The twitching usually stops within 24 to 48 hours of reducing caffeine. This was the fix for me — I was on my fourth cup by 2 p.m. every day and my eyelid was staging a protest.

Sleep and stress

Eye twitching is strongly linked to sleep deprivation. If you have been getting less than seven hours, that is likely the cause. Get a full night of sleep — eight hours minimum — for two or three nights in a row. The twitch often disappears by the second morning.

Stress: same mechanism. Stress hormones make muscles twitchy. Reducing stress is not as simple as cutting caffeine, but knowing the connection helps. The twitch is not a new disease — it is your body being overwhelmed.

Screen time and dry eyes

Staring at screens reduces your blink rate by about half. Dry eyes are twitchy eyes. Use lubricating eye drops — the plain artificial tears kind, not redness reducers — several times a day. Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds. This rehydrates your eyes and relaxes the focusing muscle that is locked onto your screen all day.

Magnesium and electrolytes

Magnesium deficiency can cause muscle twitching anywhere in the body, including the eyelid. Eat more magnesium-rich foods — spinach, almonds, black beans, avocado — or take a magnesium supplement. Do not megadose. The recommended dietary allowance for adults is around 400 mg. Too much magnesium gives you digestive problems, which is a different kind of discomfort.

When to see a doctor

If the twitching lasts more than two weeks, spreads to other parts of your face, or causes your eyelid to close completely, see a doctor. Those are signs of hemifacial spasm or blepharospasm — conditions that need medical treatment. If the twitching is accompanied by other symptoms — facial weakness, vision changes, numbness — go to urgent care. Those are not eyelid twitches. Those are something else.

My four-day twitch stopped the day after I cut my coffee intake and slept nine hours. I was fine. I was just exhausted and over-caffeinated. Most twitchy eyelids are just asking for a break.