You look down and realise you have been biting your nails for ten minutes. You did not decide to. That is the frustrating nature of these habits: they run below awareness, which is why willpower alone so rarely stops them.
Body-focused repetitive behaviours
Nail biting, hair pulling, skin picking and cheek chewing belong to a group called body-focused repetitive behaviours (BFRBs). They range from a mild habit to a condition that causes real damage and distress. When hair pulling or skin picking becomes severe, they are recognised diagnoses: trichotillomania and excoriation disorder.
They tend to happen in two modes:
- Automatic: while reading, driving, or watching a screen, without noticing.
- Focused: in response to tension, boredom, or an urge that builds until it is relieved.
Shame is common, and it is unhelpful. These are not signs of weakness.
What works best
The treatment with the strongest evidence is habit reversal training (HRT), a behavioural method. There is no recognised first-line medication. HRT has three core steps:
- Awareness training. Learning to notice the behaviour, the urge before it, and the situations that set it off.
- A competing response. Doing something that makes the behaviour physically impossible for a minute or so, such as making a fist or sitting on your hands.
- Support. Someone who gently prompts and encourages you.
Related approaches include a comprehensive behavioural model and acceptance-based therapy.
Where hypnosis fits
The evidence for hypnosis in BFRBs is limited: mostly case reports and small series, a few of them in children with hair pulling, with little controlled research. It should not be presented as a proven treatment.
But the ingredients of hypnosis line up well with habit reversal, and it can be used to strengthen it:
- Raising awareness. A post-hypnotic cue that the hand moving towards the face is noticed straight away.
- Rehearsing the competing response in imagination, so it comes more readily.
- Reducing tension, a frequent trigger.
- Urge surfing. Practising letting an urge rise and fall without acting.
- Motivation. Picturing healthy nails, hair or skin.
- Self-kindness in place of self-criticism, which tends to fuel the cycle.
A combined routine
Step 1: Keep a record for a week. Note when, where, and how you were feeling. Patterns appear quickly.
Step 2: Choose a competing response. Clench your fists for a minute. Press your palms on your thighs. Hold a smooth stone. Pick something you can do anywhere.
Step 3: Change the surroundings. Keep nails short and filed. Wear plasters, gloves or a hat in high-risk situations. Keep a fidget object where you sit.
Step 4: Ten minutes of self-hypnosis a day.
- Relax with slow breathing and a body scan.
- Picture a typical trigger situation.
- See your hand begin to move, and imagine noticing it at once, as if a small bell had rung.
- See yourself doing the competing response, and feel the urge rise, peak and fade.
- Repeat these suggestions:
– “The moment my hand moves towards my face, I notice.”
– “I make a fist, breathe out, and the urge passes.”
– “My hands are calm and at rest.” - Picture your nails, skin or hair looking healthy.
- Count from one to five and open your eyes.
Step 5: Be patient with slips. Expect them. Note what set it off and carry on.
Wording that helps
Avoid harsh or disgust-based suggestions. “My nails taste revolting” tends to fade and adds to shame. Positive, specific wording about noticing and choosing lasts longer.
For children
Many children bite their nails and grow out of it. Nagging and punishment make it worse. Gentle awareness, a fidget toy, praise for effort, and a story-based relaxation at bedtime are better. If hair pulling or picking is causing bald patches, sores or distress, see your doctor.
When to get professional help
- Bald patches, wounds, infections or scarring
- Swallowing hair, which can cause a dangerous blockage
- Hours a day lost to the behaviour
- Significant shame, avoidance or low mood
Ask your doctor about referral for habit reversal training. Specialist charities for BFRBs also offer information and support.
The bottom line
Habit reversal training is the proven method. Hypnosis is a reasonable way to rehearse and reinforce it, and to take the tension out of the cycle.
Next in the series: Virtual Reality Hypnosis: Putting on a Headset to Go Under
This article is for general information and is not medical advice.