Part of the modern condition is that we tend to spend a lot of time at the computer screen. Subsequently, we forget that our bodies are positioned in unnatural positions for long periods. So when we suffer from neck, arm and back pain, technological solutions are often sought (a better chair, a new mouse, drug therapy, back manipulation, etc) rather than tracing the causes. Perhaps a better course is to work on the positioning that is so static, and on the musculo-skeletal system that needs greater strength.
For over 20 years I have struggled with painful conditions of the neck, arms and lower back that can be traced to intensive and sustained screen-based work. Eventually, after some false starts, I have adopted a set of strategies that ameliorate the pain. They include: adopting alternative positioning (including a workstation that I stand at) for screen work; significant strengthening of neck, arm and lower back muscles through exercise; and interrupting work with sort breaks.
Perhaps one modification produced the greatest effect, in this case for lower back pain. After exercising regularly (about 10 minutes each day) with the exercise set described on the linked document, I lost all lower back pain in a short period of time. I found a series of simple exercises, that don’t require any equipment or a lot of time. Each day, I repeat the four exercises (Back Exercises 1, 2, 4 and 6) 30 times. Someone starting this activity could begin with fewer repeats.