cervical nerve root irritation – nerves in the neck exit the spinal cord via small holes between the vertebrae. These small holes can be narrowed by inflammation, injury or outgrowths of bone tissue (bone spurs). The nerves are irritated or compressed, causing pins and needles and, sometimes, referred pain into the arms
sciatica – the legs and feet are serviced by the sciatic nerve, which starts between the vertebrae of the lower back. This nerve can be irritated or compressed due to problems in the lower back or pelvic or buttock area causing pins and needles, and sometimes pain, down the legs.
