San Diego doctors are going public with a blunt warning about a viral do-it-yourself beauty stunt that tells people to hit themselves in the face to get a sharper jawline. The fad, known as bonesmashing, features users tapping or striking their cheekbones, chins and jawlines with hammers, trophies or even bare hands, then posting the results for likes and followers.
Local doctors sound the alarm
As reported by CBS 8, board-certified oral and maxillofacial surgeon Dr. Young Jun said the short-term fallout can be ugly: broken facial bones, nerve injury, changes to the bite and surgeries that require plates and screws to repair the damage. He told the station that repeated blows do not "remodel" bone in any helpful way and warned of longer-term dangers such as concussions, vertigo and chronic traumatic brain injury.
What the trend looks like
Clips circulating online show people smacking their faces with hammers, handheld massagers, heavy trophies or just their fists, then proudly filming the swelling as supposed proof of "progress." That footage feeds the belief that the technique can reshape facial structure over time. Fans sometimes cite Wolff’s law, a century-old concept that bone adapts to stress, but critics say what is happening on social media looks a lot more like performative self-harm than science. GQ has traced the trend through looksmaxxing forums and viral how-to videos.
Medical journals flag the risk
The concern is not staying on TikTok. Clinicians have sent letters titled "urgent concern regarding 'bone smashing'" to the Journal of Stomatology, Oral and Maxillofacial Surgery, urging colleagues and social platforms to push back on misinformation and remove tutorial-style content. The correspondence warns that uncontrolled fractures can heal in the wrong position, a complication known as malunion, and can leave people with facial asymmetry and lasting functional problems that then require complex reconstructive surgery. As outlined by the Journal of Stomatology, clinicians frame the fad as a public health and patient safety issue, not a harmless internet joke.
Wolff's law is not a free pass
Wolff’s law does describe how bone slowly remodels in response to steady, controlled loads, such as weight-bearing exercise or orthodontic treatment. That principle, however, does not endorse blunt-force hits to the head and face, and in practice may lead to the opposite of what participants hope to achieve. Medical reporters and clinicians told Healthline that random impacts are far more likely to cause crooked healing, nerve damage and permanent disfigurement than any neatly "sculpted" jawline.
How to respond
Surgeons and mental health experts advise steering clear of viral how-to clips, reporting harmful videos on social platforms and consulting a board-certified specialist for anyone seriously considering facial contouring. Cultural reporting has linked bonesmashing to the looksmaxxing subculture and to online echo chambers that normalize risky cosmetic hacks, a pattern examined by Vice. If someone develops severe swelling, deep cuts, bleeding or trouble breathing after trying a do-it-yourself facial injury, clinicians say it is time to seek emergency care immediately.
In San Diego, doctors are united on one point: safely reshaping a face takes medical planning and surgical skill, not a hammer, a smartphone and a trending hashtag.
