Arm pain generally occurs because of cervical problems especially when you work on PC or travels for along time. it leads to the compression of the nerves and the pain occurs withh or wthout pain in the neck which travels down the arm to thefingers also. You sometimes can have tingling, numbness and heaviness along with shrp and shooting pain.
Frozen shoulder or periarthritis sometimes can lead to pain in arm. a precise diagnosis is required.
Next Steps
A physiotherapist can do a good diagnosis according to the symptoms and the movements increasing and decreasing pain.
Health Tips
avoid prolonged travelling, avoid lying on left side, no cold exposure, avoid prolonged neck bending. take rest....GET WELL SOON!