This is because of prolonged posture assumption as in case of neck bending. It leads to muscle weakness and pain in the neck are and sometimes tingling /numbness /heaviness in the arm or hand.
Next Steps
Go to a physiotherapist.. Ultrasonic therapy +TENS +heat therapy +some strengthening exercises will be helpful for sure.
Health Tips
At home.. Rest +hot water fomentation +pain killer gel +no long sitting /travelling /driving +no cold exposure +no manual exertions +no weight lifting +avoid cold exposure +no forward bending of neck +correct posture (sit tall).