This clinical trial wants to find out if using a special bracelet that vibrates gently whenever someone with a nail-biting problem bites their nails can help them stop. The investigators are looking at adults who bite their nails a lot. If this bracelet works, it could make nail-biters bite their nails less and have a better life.

The main question the investigators are trying to answer is: "Does the gentle vibration from the bracelet make people bite their nails less?"

The investigators will give participants a bracelet that vibrates when it senses nail-biting for 12 weeks. Participants will need to download an app that connects to the bracelet. This app will help the investigators keep track of how often participants get these vibration signals and see if nail-biting decreases while using the bracelet.

Inclusion Criteria:

1. Patients diagnosed with onychophagia
2. Must understand and voluntarily sign an informed consent form
3. Must be aged 18-95 years at the time of consent
4. Must be able to adhere to the study visit schedule and other protocol requirements

Exclusion Criteria:

1. Subject is unable to provide written informed consent for any reason.
2. Subject is sensitive or allergic to any of the elements included in this study.
3. Subject is unable to complete the required pain dairy.
4. Subject is pregnant, planning pregnancy, or nursing.
5. Subject does not have a compatible personal device with either IOS 13.0 or greater or Android version 6.0 or greater.

All of the individual participant data collected during the trial, after de-identification

Immediately following publication. no end date

Anyone who wishes to access the data