It has very less to do with lung cancer. If you r a working lady then sitting for long hours and wrong posture is giving u this problem.Your back muscles get tired due to constant use leading to pain,stiffness and uneasiness in doing work.And small facet joints also become locked .
Next Steps
Meet a good physio nearby.learn some back exercises for flexibility and strength and also learn correct posture at work .
Health Tips
drink lot of water
heating 15 min will help.