What would cause cervical spondylosis in a 30 year old? (seen on mri) and could it cause random sensory symptoms?

Degenerative disease. Spondylosis is another word for degenerative disease or arthritis. There may not be a "cause" other than having a neck and living more than 20 years (mri studies of people with no pain have shown degenerative findings that appear and progress after age 20). If the degenerative discs and joints become inflamed or compress nerves, abnormal skin sensations, shooting pain, or weakness can occur.