Nervous System Activity
As your brain activity slows down, some of the signals sent to your muscles may fire irregularly, causing sudden spasms.

Stress and Anxiety
Emotional stress or an overactive mind can increase the frequency or severity of sleep twitches. Stress prevents your body from relaxing smoothly, making spasms more likely to occur.

Fatigue or Sleep Deprivation
When your body is extremely tired, the transition to sleep becomes irregular, making spasms more common.

Exercise Before Bed
Intense physical activity close to bedtime can keep your muscles active, making it harder for your body to fully relax.

Evolutionary Origins
Some researchers suggest that sleep twitches may be an ancient reflex designed to protect humans from falling from trees or unsafe resting places while sleeping.

Are Sleep Twitches Dangerous?
For most people, sleep twitches are completely normal and nothing to worry about. However, if they occur frequently or regularly disrupt your sleep, they may indicate an underlying problem such as:

Chronic stress or anxiety
Sleep disorders, such as restless legs syndrome
Neurological conditions, in rare cases
If tremors are causing distress, it’s a good idea to consult a health care provider.