Students' Phones Are on During Every Single Period

Not during lunch. Not during passing periods. Every hour. A new JAMA Network Open study tracked 79 kids aged 11 to 18 years via iPhone Screen Time screenshots for 2 weeks — thousands of real-world data points — and found zero students who kept their phones away during school. Not one.

On average, these kids spent 2.2 hours on their phones across a 7-hour school day. That's nearly a third of the day. Social media and YouTube alone accounted for 70% of that usage. The older teens (15 to 18 years) were on their phones roughly twice as much per hour as the middle schoolers — and unlike the younger kids, they didn't reduce usage at all on school days versus non-school days. Interesting.

Here's the sneaky part: total screen time didn't predict poorer cognitive control. Frequency of phone pickups did. Kids who checked their phones more often — averaging 64 times during school hours — scored worse on an inhibitory control task, independent of how long they actually spent on the phone. It's not the binging, it's the compulsive checking.

The proposed mechanism: repeated pickups fragment attention the same way task-switching does, depleting the executive resources needed for sustained focus. Whether the checking causes the poor control or reflects it is still an open question.

Takeaway: Counseling patients to reduce screen time may be less useful than targeting the checking habit specifically — which is a more actionable conversation to have.

Source: JAMA Network Open

Your Patient’s “Bruising” Might Be Your Prescription

A 75-year-old woman walked into dermatology with skin so blue-gray she looked like a walking bruise — and her GP had been calling it exactly that. For 7 years.

She'd been on minocycline 50mg twice daily for rosacea. For 25 years. By the time anyone connected the dots, the pigmentation had spread to her hands, face, sclerae, teeth, gingivae, and nails. The woman was wearing long sleeves in public because of a drug her doctor prescribed for a cosmetic condition.

Here's the sneaky part: this isn't rare. Minocycline-induced hyperpigmentation hits somewhere between 2.4% to 14.8% of patients — and because it creeps in slowly, it routinely gets misdiagnosed as post-inflammatory changes, venous disease, or just... aging. Meanwhile the prescription keeps getting renewed.

The mechanism involves iron-chelated minocycline complexes and melanin deposition in dermal macrophages — there are actually four distinct subtypes, and some are irreversible. The good news: stop the drug, and Type 1 and 2 can resolve. The bad news: teeth staining is permanent.

Takeaway: If your patient has been on minocycline longer than 6 to 12 months — especially for rosacea — look at their skin. All of it. British and Australian guidelines already recommend against long-term use. Your prescription pad should agree.

Source: Clinical Case Reports

The Pros Are Playing Blind

The people paid to be good at pickleball are the least likely to protect their eyes doing it. A new JAMA Ophthalmology study found that only 20% of professional pickleball players wear any eye protection — compared to 45% of amateurs. The pros are somehow worse at this.

The stakes are real: pickleball-related eye injuries increased nearly 7-fold between 2017 and 2022, and over a third of all estimated eye injuries in the sport's entire 20-year history happened in 2024 alone. We're talking corneal abrasions, hyphemas, retinal tears, globe lacerations — from a plastic ball traveling 40 mph at someone standing 14 feet away with under 400 milliseconds to react.

Here's the sneaky part: among the amateurs who did wear eyewear, 61% were just wearing their regular prescription glasses — which have roughly 5% of the impact resistance of polycarbonate sport lenses. Per Advancing Standards Transforming Markets International standards updated specifically for pickleball in 2024, those frames can actually increase injury risk in high-impact situations by shattering.

The most common reasons for skipping protection: fogging, discomfort, and — strikingly — simply never having thought about the possibility of an eye injury in pickleball.

Takeaway: Patients who play pickleball (and there are a lot of them) likely believe glasses count as protection. They don't. Worth a quick mention at the next visit.

Source: JAMA Ophthalmology

Turn It Down (For Real This Time)

Turns out fitness instructors have been cranking the music to 11 for no reason.

A new study out of University of Southern California, Los Angeles tested what happens when group fitness classes drop the volume by just 3 dBA — roughly the smallest difference the human ear can even detect. Perceived exertion? Basically identical. On the validated Borg CR-10 scale, the difference was −0.66 points out of 10, well below the 1.0-unit threshold considered clinically meaningful. They even modeled reductions up to 4 dBA and noninferiority held the whole way.

Here's the sneaky part: these classes were averaging 91.4 dBA — above The Occupational Safety and Health Administration's occupational action level, and well past The National Institute for Occupational Safety and Health's recommended ceiling of 85 dBA. We're not talking concert-adjacent. We're talking every Tuesday morning spin class.

The mechanism matters too: fitness environments may hit harder than equivalent occupational exposures because increased metabolic demand during exercise generates reactive oxygen species, potentially amplifying cochlear damage. And repeated temporary threshold shifts? Those can accumulate into permanent ones.

The kicker: only 2.1% of participants wore hearing protection. Nearly 15% reported postclass tinnitus. Most just... shrugged it off.

Takeaway: If your patients are regular fitness class attendees, this is a real, underappreciated noise-induced hearing loss exposure. Ask about it — and maybe mention it to the gym.

Source: JAMA Otolaryngology–Head & Neck Surgery

The clinical literature. Applied to the patients in your waiting room.