All that scrolling, swiping and staring down at your device is leaving its mark.

With the average American glued to their smartphone for more than five hours a day , experts are warning that screen time is speeding up aging in a spot most of us neglect.

Dermatologists call it “tech neck,” and it’s becoming increasingly common — even in younger patients. Here’s everything you need to know.

What is tech neck?

It’s the early onset of wrinkles and sagging skin on the neck caused by repeatedly leaning the head forward while using phones, computers and other devices.

“The skin of the neck is inherently thinner and more sensitive compared to most of the body, so with age, the neck is especially vulnerable to creases and lines,” said Dr. Helen He , co-director of Mount Sinai-Clinique Hea

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