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mostly is of no cause.In your situation probably it is secondary to cervical spondylosis
.If there is any nerve compression or disc structural deformity , surgery stands as a mainstay and later followed by physiotherapy
.Considering you have no compression , you should go for physical exercise on the first go and surgery later , if results are not comfortable.Even when surgery is done , physical therapy
has to be continued.If wearing a neck collar / brace , please do not use it for long hours .That can worsen the symptoms.