Here you nee to check on few things. do you have any radiating pain to your hand from neck or numbness feeling in hand from the neck? As well need to check the same with lower limb too. So do you have any pain or numbness radiating from back to your legs.if yes then it can be related with respected disc problem either cervical or lumbar. But if its pain and stiffness at local area only then it can be only muscular pain for which you can use frequent hot pack on your painful stiff area. You should also take physiotherapy treatment along with stretching, strengthening and mobility exercises to have some more relief. At any point if your pain increases and starts radiating to your legs or arm then I suggest take a visit of orthopedic doctor and go ahead for evaluation ( mri or x ray )as per his suggestion. And yes most important thing is do not get it massage by any local treatment it may be harmful for you. Take care.