The next time you get an odd text message from a friend – you may want to have 9-1-1 on standby. That’s because a nonsensical message could be a warning sign they’re suffering a stroke.

Harvard University researchers say that speech, reading and writing difficulties have long been stroke red flags. In fact, 38 percent of sufferers have verbal and written difficulties pre-stroke.

But with the rapid rise of texting, a growing number of stroke victims are experiencing “dystextia”, where they send incoherent text messages right before they suffer a potentially deadly stroke.

As an example, researchers point to the recent high profile case of one Massachusetts man who rushed his pregnant 25-year-old wife to the hospital after she sent him odd text messages, like “everywhere thinging days nighing” and “some is where!” She was diagnosed with stroke – and thanks to her fast-acting husband, she was treated quickly and she and her unborn baby were fine.

That’s why doctors are spreading the word that incoherent text messages could be a sign of an impending stroke.  Especially among young people, who think their stroke risk is practically zero.