Nerve root soreness comes from a nerve within the spine. Nerves bring messages about sensations and control of muscles and so problems with the nerves can cause pain, numbness, improved sensitivity or weakness of muscles. The ache is mainly felt in the area of the body which is supplied by that nerve. It is common for the leg nerves and arm nerves to be affected.
Lumbar nerve pain, also known as “sciatica” more commonly goes beneath the knee. Back discomfort is felt between the lower ribs and the buttocks. More commonly there will be a mixture of back and leg pains. In sciatica, the leg pain is worse than the back pain. Sciatica is more commonly caused by a disc prolapse or a “slipped disc”, but there are different factors.
Nerve pain in the arm is like sciatica but it is caused by the neck nerves. Generally the pain goes down the arm as far as a certain finger.
Radicular pain is a term doctors use to explain pain when it’s typically from a single nerve root.