Why You Bite Your Nails & Pick Your Skin: Psychiatrist Explains the Real Reason | Dr. Tracey Marks (2026)

Ever wondered why you can't stop biting your nails or picking at your skin? It's a common struggle, but the reasons might surprise you. Dr. Tracey Marks, a psychiatrist with over 20 years of experience, shed some light on this in The Mel Robbins podcast. Let's dive in!

Dr. Marks identifies these behaviors as a 'disorder' and uses the term 'body-focused repetitive behaviors' to describe them. This encompasses skin picking and hair pulling, which can become quite problematic. For some, the compulsion can be so strong they pull hair out from the root, finding a certain satisfaction in it.

But here's where it gets controversial... Dr. Marks also includes nail biting, cuticle biting, and even biting the inside of your cheek within this category. So, what's the root cause?

According to Dr. Marks, the underlying reasons often vary. People with anxiety might engage in these behaviors to soothe themselves and relieve tension. Those with ADHD, on the other hand, might do it for stimulation. The ADHD brain craves sensory input, and these actions provide it.

So, how can you break free from these habits? Dr. Marks emphasizes the importance of awareness. Recognizing that you're engaging in body picking is the first step. Understanding the triggers, such as anxiety or boredom, is also crucial.

Next, she recommends a technique called 'habit reversal.' This involves replacing the unwanted behavior with a more constructive one. For example, someone who bites their nails could wear gloves. This breaks the automatic cycle and encourages more intentional actions.

And this is the part most people miss... The Cleveland Clinic states that up to 5.4 percent of people experience dermatillomania, or skin picking, at some point in their lives. Several therapies can help, including habit reversal therapy, group therapy, and acceptance and commitment therapy. If you suspect you have this disorder, it's essential to consult a healthcare professional.

What do you think? Do you agree with Dr. Marks' insights? Have you found any strategies that help you manage these behaviors? Share your thoughts and experiences in the comments below!

Why You Bite Your Nails & Pick Your Skin: Psychiatrist Explains the Real Reason | Dr. Tracey Marks (2026)

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