Hi,Thanks for query.
It is possible that the atmosphere where yuo are working may be responsible to some extent but not entirely due to this.
Keep your working room well ventilated with free wind entry,
Keep room with well day light is there.
If you are elderly then possibility of having cervical spondilitis you should keep in mind.
Even your posture when you work with straight neck for long time may also give this problem.
Go for X ray
if require and go for treatment accordingly.
Ok and bye.