Hello,
Ergonomics stress a neutral position while working on the computer. About five years ago, I was diagnosed with Fibromyalgia & it all began with severe neck pain, which can be directly attributed to long hours on the computer at a very un-ergonomic workstation.
If you are unsure of how your work station should be set up, there is much information online on this subject.
After my diagnosis I received physical therapy where I was told to get up from my work desk about every 20 minutes & move around. My PT also showed me some neck exercises to perform. Although I am no longer working, I continue to perform these exercises.
Like many with Fibro, I suffer from osteoarthritis as well & this, too, was aggravated by the poor posture & poor ergonomics at the work station.
I am not a doctor however, I disagree with yours as I've heard of many who suffer from long hours at the computer. If you must be in this position, be sure that it's a neutral one &, again, get up periodically & move around. My PT even suggested setting a timer to ensure that I do this.
The degenerative conditions you suffer from may be genetic however, symptoms as you describe can very well be exacerbated by poor posture as a consequence of poor ergonomics.
Please research proper ergonomics along with various exercises to perform while spending long hours at the computer.
Best wishes,
georgia