The head-down forward flexed position that you use to look at phones,iPads and laptops can strain the muscles in your neck so much, that over time the resulting changes can cause pain to extend all the way down your spine well into your lower back or into your arms and hands.  Burning, numbness and tingling is a common sign.  This is especially bad for you if you are using these devices for hours at a time because your body will eventually start to adopt this hunched-like Grinch position.

So how do you fix it? Make sure you take frequent screen breaks.  Try to look straight ahead rather than down at your screen.  You might also look for a stand to help you hold your laptop or tablet at a more back-friendly height and angle, such as an adjustable vented laptop computer stand