What happens if I fall asleep during hypnotherapy?

As a clinical hypnotherapist, one of the most frequent questions I get asked, with a mix of curiosity and concern, is: “What happens if I fall asleep during hypnotherapy?” “Will it still work?” The short answer is “Yes”. I thought it would be interesting to understand why it works and to explore how the conscious mind and the subconscious mind work, with a science-based description of hypnotherapy.

So, what is the conscious mind? 

The conscious mind is the part of our mind we are most familiar with. It allows us to be active, analytical, and logical. It is responsible for reasoning, decision-making, willpower, and awareness of the present moment. So, for example, when you are planning your day, or studying for an exam, or learning a new language, all of these use your conscious mind.

What is surprising is how limited space is in our conscious mind, and it only works best when we have focused attention.  So it isn’t great if we need to multitask, or even handle long-term memory, or anything that is based on emotional habits.

It’s important to know that your conscious mind controls your awareness. It filters information based on existing beliefs and learned logic. So if something doesn’t ‘fit’ with your conscious belief system, it often gets rejected or rationalised away. This is why will power alone often fails when trying to break a habit like smoking, overeating, drinking, or negative self-talk.

So, what is the subconscious mind?

The subconscious mind operates below conscious awareness. This is where long-term memory, emotions, learned patterns, automatic behaviour, beliefs, and even your sense of identity reside. In contrast to the conscious mind, the subconscious is vast and fast; it processes millions of bits of information automatically, helping you navigate life based on past experiences and their internalised meaning. So, for example, once you have learnt to drive, the conscious mind is no longer needed for every step. Your subconscious handles it automatically, turning the wheel, checking mirrors, applying the brakes, while your conscious mind focuses on where you are going or what's on the radio.

The challenge is that once something is embedded in the subconscious mind, especially in relation to emotional responses or core beliefs, it becomes very difficult to change with conscious effort alone. That is where hypnotherapy comes in.

So, how does hypnotherapy work?

It is a therapeutic approach that allows direct communication with the subconscious mind.  In a typical waking state, your conscious mind acts like a filter, evaluating everything based on your learnt logic. But during hypnosis, this filter becomes more relaxed or ‘bypassed’, allowing helpful suggestions to go straight to the subconscious, where they can initiate deep and lasting change.

So one of the questions I get asked is, “Is hypnosis just going to sleep?”, or “Are you just controlling my mind?” Neither is correct. It is a natural state of focused attention and heightened suggestibility, similar to daydreaming or the moments just before drifting off to sleep. You remain in control, but your subconscious becomes more open to reprogramming outdated or unwanted patterns.

Thanks to modern neuroscience and modern neuroimaging techniques, it has been confirmed that the hypnotic state is a distinct brain state. Here’s a little bit of science for all those who are interested:

• By having reduced activity in the dorsal anterior cingulate, this quiets internal conflict and judgment.
• Having increased functional connectivity between brain regions involves emotional regulation and body awareness.
• Shifting into alpha and theta brainwaves, all associated with relaxation, learning, and enhancing memory integration.

So in a nutshell, hypnosis helps align brain activity in a way that supports deep change way beyond what the conscious mind can achieve alone.

So, returning to the question, “What if I fall asleep during a session?”

Firstly, it is important to understand that falling asleep during hypnotherapy is relatively rare in the clinical sense. What clients often experience is a deep trance, a theta-dominant state (just before you fall asleep, but you are not fully asleep). You may not consciously remember everything said, but your subconscious is still active and responsive.

Even if you do drift into light sleep, your subconscious continues to absorb suggestions. This is especially true in the early stages of sleep known as light non-REM, when auditory processing still occurs. Many clients report waking up feeling refreshed and noticing positive changes, even if they can’t recall all the details of the session.

That said, if someone were to enter deep, delta-wave sleep, the receptivity to suggestions may diminish. However, as a clinical hypnotherapist, I can notice the signs of true sleep. For example, breathing can change, meaning I guide the client back towards a lighter trance if necessary.

Sleep enables you to relax the nervous system, which still provides therapeutic benefits. It reduces stress hormones, lowers blood pressure, and improves emotional regulation.

"You are a function of what the whole universe is doing in the same way that a wave is a function of what the whole ocean is doing." 

Alan Watts

Ultimately, hypnotherapy works by bridging the conscious and the subconscious minds, allowing you to align logic with emotion, willpower with habit, and thought with behaviour. It isn’t about bypassing the conscious mind entirely; it is all about working with it by guiding it into a cooperative and receptive state.

That is why I always have a pre-talk, so there is a conscious understanding before I begin a session. When your conscious mind understands the goals, feels safe, and agrees with the direction, your subconscious is far more likely to accept and implement the changes.

Suppose you are thinking about having hypnosis, but you may be worrying that you may fall asleep during the session, zoning out, or not being able to do it ‘properly’. In that case, then just let all the feelings go, as your subconscious mind is remarkable, it allows you to be responsive and capable. Whether you are full alert, drifting into a relaxed and dreamlike state, the therapeutic suggestions are still being delivered; that is when the real work happens.

So the session will still benefit you because it doesn’t rely on conscious effort alone. It comes from aligning the deeper, quieter parts of your mind with your goals and aspirations and letting your inner mind do what it does best: guide you towards healing, growth, and balance.