How hypnosis works

How Will You Feel After a Hypnosis Session?

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The end of a session is planned. A 2025 review of pediatric clinical hypnosis describes the closing “re-alerting” phase of a session with a child as gently and gradually returning the person to full awareness, typically feeling calm, safe and in control. In rare cases people feel something less pleasant afterward, and it helps to know what that looks like.

What do side effects look like?

They are uncommon. WebMD’s medically reviewed overview lists four side effects that can occur in rare cases:

  • anxiety
  • headaches
  • dizziness
  • drowsiness

These are the after-effects worth planning for. They are also the reason not to rush straight from the chair to the car.

Can you drive afterward?

Wait until you feel fully alert. If you feel drowsy or dizzy, let it pass before driving, as you would after any experience that leaves you sleepy. Sitting for a few minutes, drinking some water and walking around the room is a reasonable routine before you leave.

If you know you tend to feel heavy after relaxation exercises, book a time when you do not have to drive straight to something demanding.

What if you feel emotional?

It can happen. If the session touched on something painful, a tender or raw mood for a while afterward is a reason to be gentle with your schedule. If a strong reaction does not settle, or you feel worse rather than better over the following days, tell the practitioner. If you ever have thoughts of harming yourself, call or text 988 in the United States to reach the Suicide and Crisis Lifeline. Outside the United States, contact your local emergency number or crisis line.

Will you remember the session?

Probably. WebMD notes that, unlike some film and television portrayals, you’ll probably remember what happens during the session. That memory is useful: write down anything that stood out while it is fresh, because it is material for the next appointment.

WebMD also warns that hypnosis by someone who is not a trained professional could lead to the creation of fake memories. If you leave a session with a vivid new “memory” of past events, treat it with caution rather than as a discovery.

What if you felt nothing much?

That happens. WebMD notes that some people cannot reach the full dream-like state of hypnosis, which makes the treatment less helpful for them. Feeling only pleasantly relaxed is not a failed session in itself; judge it by whether the situation you came in for changes over the following days and weeks, and if nothing has moved after a few sessions, say so.

How long do the effects last?

There are two different things to watch: how you feel in the hour after a session, and whether the change you came for appears over the following days and weeks. The second is the one that counts: hypnotherapist Deirdre Barrett, quoted in the Wikipedia article on hypnosis, describes therapeutic suggestions as usually post-hypnotic, intended to affect behavior for periods ranging from days to a lifetime, and often repeated over several sessions before they reach their full effect.

So the useful question after a session is not “do I still feel relaxed?” but “did anything change in the situation I came in for?”

When should you call someone?

Use one rule: mild drowsiness, a brief headache or a reflective mood that fades within the day are side effects to mention at your next session. Dizziness or headaches that persist, anxiety that keeps building, confusion, or a feeling of being disconnected from your surroundings are reasons to contact the practitioner promptly and to seek medical advice.

This article is general information, not medical or psychological advice; talk with a licensed clinician about your own situation.

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