From 2014 to 2018, the researchers report, more than 39,000 people in the USA were injured from riding these seemingly sedate scooters, and about 3,300 people were admitted to the hospital.
About a third of injuries recorded in 2018 affected the head, the researchers report-which actually makes the rate of head injuries relative to all injuries among scooter riders more than double that seen among cyclists, the paper says.
Teen Killed, 3 Injured After American Family Attacked in Mexico
Armed gunmen attacked an American family returning to the US from Mexico, killing a 13-year-old and wounding three others. Migrants seeking asylum in the United States through Guatemala must request protection in the Central American country.
"Scooters promote active commuting", could help spur wider public transit use and could lead to less traffic congestion, said lead author Dr. Benjamin Breyer.
Millennials had the greatest increase in injuries of any group, with a more than nine-fold increase in injuries over four years.
The researchers had previously looked at bicycle injuries using the same data set, finding that scooter riders had a higher proportion of head injuries.
Patricia Arquette accidentally hit co-star Joey King with her Golden Globes trophy
Whacked: 'And as I was taking a bow, she raised her Golden Globe statue up and whacked me in the forehead. "No, seriously. But only Joey King can say the winning actress hit her in the head.
Researchers called for more study and better safety features.
Despite the rapid growth of electric scooters in cities across the USA and Europe in particular, there is still very little regulatory oversight - and no law which states that wearing a helmet is mandatory.
Riding an electric scooter on the road - or the pavement - is now forbidden in the United Kingdom, with drivers facing a fine and six points on their driving license if they're caught doing so.
Britain to send two warships to Gulf as Iran tensions intensify
Whilst Iran has sworn to avenge the death of the Iranian Guards commander Qasem Soleimani, it has taken no direct action yet. HMS Montrose and HMS Defender have been sent to escort the British-flagged ships through the region.
A study out of the University of California, San Francisco published Wednesday in JAMA Surgery, found that the number of scooter-related injuries in the country between 2014 and 2018 grew by 222% to more than 39,000 injuries. In 2014, 582 injuries were reported to the database among millennials. Smashing into concrete isn't pretty and over a quarter of the injuries - 27 per cent - resulted in fractures.