What causes persistent twitching of the lower eyelid?

Constant twitching of the lower eyelid usually refers to eyelid spasms. Eyelid spasms may be caused by eyelid muscle fatigue, excessive intake of caffeine and stimulants, electrolyte imbalance, autonomic nervous system dysfunction, or conjunctivitis. Specific causes are analyzed as follows:

1. Eyelid Muscle Fatigue

Prolonged eye use, reading, extended exposure to electronic screens, fatigue, lack of sleep, or overuse of the eyes can lead to eyelid muscle fatigue, triggering eyelid spasms. Give your eyes adequate rest, avoid prolonged visual tasks—especially staring at electronic screens—and perform eye relaxation exercises, such as closing your eyes and gently massaging them or applying a cold compress.

2. Excessive Intake of Caffeine and Stimulants

Consuming too much caffeine or other stimulants, such as coffee, tea, chocolate, or energy drinks, may trigger eyelid spasms. It is recommended to limit the intake of caffeine and other stimulants to reduce the frequency of eyelid twitching.

3. Electrolyte Imbalance

Imbalances in certain electrolytes, such as deficiencies in potassium or magnesium, may cause muscle spasms, including in the eyelid muscles. Ensure your diet includes sufficient magnesium, potassium, and other essential electrolytes.

4. Autonomic Nervous System Dysfunction

Chronic mental stress, excessive pressure, or underlying conditions such as myasthenia gravis or diabetes may lead to autonomic nervous system dysfunction, causing uncontrolled activity of the autonomic nerves and resulting in spasms of the eye muscles under neural control. Under medical guidance, medications such as oryzanol tablets, vitamin B1 tablets, or mecobalamin tablets may be used to regulate nerve function.

5. Conjunctivitis

Conjunctivitis may result from eye irritation due to foreign substances like sand or chemicals, or infection with pathogens such as bacteria, viruses, or chlamydia. Inflammation can stimulate the muscles inside the eyelid, causing muscle contractions. Follow medical advice to treat with medications such as rifampicin eye drops, chloramphenicol eye ointment, or erythromycin eye ointment.

If discomfort persists, prompt medical consultation is advised.