Can You Wake Up Inside Your Dreams? The Strange Science of Lucid Dreaming

Fez — Imagine standing on a rooftop, looking down at a city you have never visited. Suddenly, you realize something impossible. You can fly.

You step forward, rise into the air, and watch the buildings disappear beneath you. The experience feels real, yet you know none of it is actually happening.

You are dreaming, and somehow, you are aware of it.

This phenomenon is known as lucid dreaming, a state in which people recognize that they are dreaming while remaining asleep.

For some, the realization comes with the ability to influence what happens next. They might change their surroundings, confront a nightmare, or attempt something impossible in waking life.

Others simply observe the dream with the unusual knowledge that it is not real.

And despite its almost supernatural reputation, lucid dreaming is a scientifically documented experience.

How can the brain know it is dreaming?

Most lucid dreams occur during rapid eye movement (REM) sleep, the stage associated with particularly vivid dreaming.

During ordinary dreams, people generally accept even the strangest events without questioning them.

In a lucid dream, however, some degree of self-awareness emerges.

The dreamer recognizes the experience as a dream without necessarily waking up.

Researchers have investigated this phenomenon using brain recordings and carefully designed sleep experiments.

In 2021, an international team published a remarkable study demonstrating that lucid dreamers could communicate with researchers while asleep.

Participants answered simple questions using predetermined eye movements or facial muscle signals.

The findings demonstrated that sleeping people can sometimes process information from the outside world and respond without fully awakening.

More recently, a 2025 neuroscience study identified patterns of brain activity associated with self-awareness during lucid dreams.

Scientists are still investigating exactly how this awareness emerges.

Importantly, knowing that you are dreaming does not automatically mean you can control everything that happens.

Can you teach yourself to lucid dream?

Although some people experience lucid dreams spontaneously, researchers have investigated techniques that may increase their frequency.

One of the simplest approaches is keeping a dream journal.

Immediately after waking, people write down whatever they remember, including unusual characters, places, emotions, and events.

Over time, this can improve dream recall and help them recognize recurring patterns.

Another popular practice involves reality checks.

Throughout the day, someone might look at a clock, examine their hands, or ask themselves whether they are dreaming.

The idea is to develop a habit of questioning reality that might eventually appear inside a dream.

However, scientific evidence for reality checks alone remains limited.

A more extensively studied technique is Mnemonic Induction of Lucid Dreams, commonly known as MILD.

Before falling asleep, the person recalls a recent dream and imagines recognizing that it is a dream.

They repeatedly set an intention to become aware the next time they dream.

Another method, Senses Initiated Lucid Dreaming (SSILD), involves briefly focusing on visual impressions, sounds, and bodily sensations before returning to sleep.

A 2020 international study involving 355 participants found that MILD and SSILD showed comparable effectiveness in encouraging lucid dreams.

The researchers also found that remembering dreams well and falling asleep quickly after practicing the techniques were associated with better results.

Neither method guarantees success.

Is lucid dreaming safe?

For most people, occasional lucid dreaming is not considered inherently dangerous.

Some researchers are also investigating its potential for reducing nightmare-related distress, particularly when dreamers learn to change their reactions to frightening situations.

Still, experts caution against sacrificing sleep in pursuit of the experience.

Some induction methods recommend waking during the night and returning to sleep. Repeated interruptions can reduce sleep quality and leave people tired the following day.

People who experience frequent nightmares, disrupted sleep, or difficulty distinguishing dream experiences from waking reality should be especially cautious about practices that disturb their rest.

There is also no guarantee that becoming lucid will produce a pleasant experience. A person may recognize they are dreaming yet remain unable to change an unsettling scene.

What makes lucid dreaming so fascinating?

Beyond the possibility of flying through imaginary cities or exploring impossible landscapes, lucid dreaming raises a deeper question about human consciousness.

If the brain can create an entire world during sleep, how can it also recognize that world as its own creation?

Researchers are still searching for a complete explanation.

For now, lucid dreaming offers an unusual glimpse into the relationship between awareness, imagination, and sleep.

It suggests that even when the body is resting and the outside world has faded away, the mind can occasionally recognize the extraordinary experience unfolding within it.