Body-focused repetitive behaviors, or BFRBs, can be stopped or significantly reduced with the right combination of behavioral techniques, environmental changes, and sometimes supplements or medication. Around 60% of people engage in at least one BFRB like nail biting or cheek chewing at a subclinical level, but for the 1.5% to 4% of people whose pulling, picking, or biting causes real distress or damage, structured approaches work far better than willpower alone.
BFRBs include hair pulling (trichotillomania), skin picking (excoriation disorder), nail biting, cheek chewing, lip biting, and teeth grinding. These aren’t simply “bad habits.” They’re driven by a loop of sensory triggers, emotional states, and momentary relief that reinforces the behavior over time. Breaking that loop requires targeting multiple points along it.
Why Willpower Alone Doesn’t Work
BFRBs are maintained by overlapping factors that researchers group into five categories: sensory (how something feels to touch or see), cognitive (thoughts that permit or encourage the behavior), emotional (stress, boredom, anxiety, anger), motor (postures or hand positions that make the behavior easy), and environmental (specific places, situations, or objects that act as cues). A person who picks at their skin while watching TV in bed at night is dealing with at least three of those categories at once. Simply deciding to stop addresses none of them.
This is why the most effective treatments break the problem into these individual pieces and tackle each one separately.
Habit Reversal Training
Habit Reversal Training, or HRT, is the most widely studied behavioral approach for BFRBs. It has three core steps.
The first is awareness training. Many people pull, pick, or bite without realizing they’ve started. Awareness training teaches you to notice the earliest signs that the behavior is about to happen: the hand drifting toward your face, the scanning of your skin for a bump, the urge building in your fingertips. You learn to catch the behavior at the urge stage rather than after it’s already underway. Keeping a simple log of when, where, and what you were feeling each time the behavior occurs can speed this up considerably.
The second step is competing response training. Once you notice the urge, you immediately perform a physical action that makes the BFRB impossible for at least one to two minutes. For hair pulling, this might mean clenching your fists at your sides or pressing your palms flat against your thighs. For skin picking, it could be holding a smooth object like a stress ball or clasping your hands together. The competing response doesn’t need to be dramatic. It just needs to occupy your hands in a way that’s physically incompatible with the behavior long enough for the urge to pass.
The third step is social support. Having someone you trust, a partner, friend, or family member, gently remind you when they see the behavior starting (without judgment) reinforces the awareness piece and helps you practice the competing response more consistently.
The Comprehensive Behavioral (ComB) Model
ComB treatment builds on HRT by systematically addressing all five categories of triggers. A typical course works through them in sequence. Early sessions focus on stimulus control and habit reversal to handle the sensory, motor, and environmental triggers. Middle sessions introduce cognitive restructuring, which means identifying and challenging the thoughts that maintain the behavior, things like “just one more” or “this bump needs to come off.” Later sessions teach stress management techniques like progressive muscle relaxation and breathing exercises to reduce the emotional fuel behind the behavior.
ComB is especially useful if you’ve tried HRT alone and found that urges still overwhelm you in certain emotional states or situations. It’s a broader toolkit.
Stimulus Control: Changing Your Environment
Stimulus control means modifying your surroundings so the behavior is harder to start. This is one of the simplest strategies and can make a noticeable difference on its own. The principle is straightforward: if you can identify the specific settings where the behavior happens most, you change something about those settings.
- For hair pulling: Wearing a hat, bandana, or hair covering during high-risk times (like watching TV or studying). Keeping hands busy with textured fidget tools. Applying a light coating of oil to hair so it’s harder to grip individual strands.
- For skin picking: Covering mirrors or dimming bathroom lighting if you pick at your face after examining your skin closely. Wearing gloves or adhesive bandages over fingertips during vulnerable times. Keeping skin well-moisturized so there are fewer rough patches to target.
- For nail biting: Applying bitter-tasting nail polish. Keeping nails trimmed very short so there’s less to bite. Wearing press-on nails or gel coatings as a physical barrier.
One study gave the example that if someone only pulls hair when their office door is closed, the intervention is simply keeping the door open during the workday. The changes don’t have to be elaborate. They just need to interrupt the automatic chain of events.
The Decoupling Technique
Decoupling is a newer approach that works differently from HRT. Instead of replacing the behavior with something unrelated, you start the habitual motion normally but redirect it at the last moment. If you’re a hair puller, you’d move your hand toward your hair as usual, but just before your fingers reach the hair, you redirect your hand to touch your ear or point toward a spot in the room with a quick, accelerated movement.
The key difference is timing: the initial motion stays the same, which means your brain’s “start” signal isn’t being suppressed. Only the endpoint changes. This can feel more natural than a competing response that requires you to do something completely different. In a randomized trial comparing decoupling to HRT, both produced meaningful reductions in BFRB symptoms.
One practical detail: unlike HRT, where you only use the technique when urges arise, decoupling works best when practiced on a schedule throughout the day, including during symptom-free periods. Setting a recurring phone timer to remind yourself to practice can help build the new motor pattern.
Supplements and Medication
N-acetylcysteine (NAC), an over-the-counter amino acid supplement, has shown promise for reducing BFRBs. It works by modulating the brain’s reward-related signaling, which may dampen the reinforcing “relief” feeling that keeps the behavior going. In clinical studies, doses ranging from 1,200 to 3,000 mg per day produced significant reductions in skin picking, and improvements have also been reported for hair pulling and nail biting at similar doses. Lower doses around 450 to 1,200 mg have also shown benefits in some individuals. NAC is generally well-tolerated, though it’s worth discussing with a healthcare provider since it can interact with certain medications.
SSRIs, the class of antidepressants most commonly tried for BFRBs, have a surprisingly weak track record when used alone. A meta-analysis of trichotillomania treatments found that SSRIs produced only a small effect compared to placebo. Older tricyclic medications showed a stronger effect, but they carry more side effects. The takeaway is that medication alone is unlikely to resolve a BFRB. It’s most useful as an add-on to behavioral treatment, particularly when anxiety or depression is fueling the behavior.
Building a Practical Plan
The most realistic approach combines several of these strategies rather than relying on just one. A solid starting plan looks like this: begin with awareness training for one to two weeks, simply tracking when and where the behavior happens without trying to stop it yet. Use that data to identify your highest-risk situations. Then layer in stimulus control changes for those situations, and start practicing a competing response or decoupling technique when urges arise.
If you find that emotional triggers like stress, boredom, or frustration consistently override your efforts, adding a stress management component (breathing exercises, progressive muscle relaxation, or regular physical activity) addresses that layer. If you want to try NAC, give it at least eight weeks at a consistent dose before evaluating whether it’s helping, since effects tend to build gradually.
Working with a therapist trained in HRT or ComB accelerates the process, particularly for hair pulling and skin picking that have persisted for years. The TLC Foundation for Body-Focused Repetitive Behaviors maintains a directory of trained providers. But even without professional support, the behavioral techniques described here are well-documented and can be self-administered. Many of the clinical trials that demonstrated their effectiveness used structured self-help manuals rather than in-person therapy.
Progress with BFRBs is rarely linear. Most people experience periods of improvement followed by temporary setbacks, especially during times of high stress. This pattern is normal and doesn’t mean the strategies have stopped working. It means a trigger has resurfaced that needs to be addressed, often with the same tools applied more deliberately.