Not only does forward head posture cause nerve pain, Collie says it can also create metabolic problems.

CNN: Your smartphone is a pain in the neck

Fishman's Text Neck Institute created a mobile app to help you remember to avoid forward head posture.

CNN: Your smartphone is a pain in the neck

Staying in what experts call the "forward head posture" can lead to muscle strain, disc herniations and pinched nerves.

CNN: Your smartphone is a pain in the neck

First, seen from the side, we can pitch our head forward, and slump our shoulders, adopting the head posture.

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Now, the ferocious dinosaur is depicted in a bird-like posture, tail in the air and head pitched forward of its two massive legs.

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