The probable cause of pain may be neuromuscular. Sometimes, there is stretching of nerves causing local inflammation and thus pain.. it is usually temporary..
Next Steps
I will suggest you to start with hot fomentation, avoid heavy work, avoid sudden jerky movements of neck, take analgesic with muscle relaxant tablet, apply analgesic ointment over the site of pain..
Health Tips
If the pain persists even after taking medicines, we will plan for some investigations later on..