The truth is, air mattresses aren't designed for long-term use, and probably shouldn't be slept on for longer than a couple of nights. If you struggle to sleep on an air mattress, you're not alone – it's actually quite normal for someone to not be able to sleep at all on an air bed.
Air beds are not very supportive, and sleeping on them for more than two nights could cause back pain, aches, and stiffness as you wake up. Without proper support for your spine, your body will not be kept in the correct position for satisfactory sleep. Your knees, hips, and shoulders may fall out of line causing your spine to curve.