Hi welcome to the health care magic You are having neck stiffness and neck pain when working.. So this presentation can be from constant working in one sitting position... If fever or any other clinical complaint present then inform about that... As you have taken tetanus shot, it provide protection usually up to 10 year.. Leg pain can be from overwork, lack of sleep, vitamin deficiency etc... If leg pain interfering routine life then your examination needed and neuropathy should be ruled out and basically investigated with serum B12 level and blood sugar levels to rule out b12 deficiency and diabetes Hope your concern solved Take care