Could a pinched nerve in neck cause colored sparks in vision constantly? i also have a lot of muscle spasms at the base of skull causing it to knot

Nerve impingement: Of the neck is a very common problem, affecting about 10-12% percent of the adult population in the us. Nerve impingement can be caused by being sandwiched between two spinal bones, pressed by a bulging disc or encroached upon by bony overgrowth. It can cause severe vision impairment and muscle spasms. Rec.: see an interventional pain management specialist for further investigation.