As you have mentioned about your pain.. it can be due to prolonged work in bend sitting posture .
If so you need to correct your posture while sitting and working..
Try to maintain a straight back while working and do chin tucks for the pain.
Next Steps
Pls visit a Physio who will be able to guide you to work and maintain proper posture.
Health Tips
Pls take a hot pack for the same and apply some ointment for pain relief.