Why Do Some People Jerk in Their Sleep ?

By Vanshika Gaur
09 May 2025, 18:00 IST

A hypnic jerk is an involuntary contraction of muscles that some people experience when they are about to fall asleep. It commonly occurs in the legs but can also occur in other parts of the body. Here are a few reasons why some people experience hypnic jerks. Tap to read!

Stress

Stress is one of the most common causes of hypnic jerks, as the nervous system becomes overstimulated, making them more frequent.

Alcohol

Alcohol can make you feel sluggish and can increase the frequency of hypnic jerks while the body metabolises it.

Fatigue

When you have been awake for too long, your body’s sleep-wake cycle is disrupted causing the hypnic jerks to occur more frequently.

Medications

Certain medications can also cause hypnic jerks as they affect the nervous system, leading to muscle twitching.

Caffeine

Drinking caffeinated beverages like coffee or tea before going to bed can overstimulate the nervous system, increasing the chances of hypnic jerks.

Information Credits

According to PubMed, hypnic jerks can occur due to caffeine, fatigue, stress, and other factors. It is advisable to consult a healthcare professional for personalised suggestions.