Anatomy of Sciatica

Anatomy of Sciatica

Share this graphic on your site!

Anatomy of Sciatica

Symptoms, Causes and Treatment

The sciatic nerve is the largest and longest nerve in the body. It starts in the lower back, then splits to run down both legs to the feet.

It provides motor control and sensation to the majority of the lower legs and feet.

Sciatica is often confused with general lower back pain, but it is a specific condition effecting the sciatic nerve.

It can interfere with daily function and be debilitating until resolved. Sciatic pain increases with flexing, twisting, and bending motions.

Between 10 and 40% of Americans will experience sciatic nerve pain at some point in their lives. (1)


Symptoms of Sciatica

The most common symptom of sciatica is lower back pain that extends through the hip and buttock and down one leg.

This pain is generally shooting and can make it difficult to sit.

Other symptoms:
Numbness or weakness in the leg
Burning or tingling feeling in the leg

Symptoms can be sudden or develop gradually over time


Sciatica Causes

Causes of sciatica include: (3)

– Ruptured, or herniated, intervertebral disc
– The jelly-like center of the disk leaks and irritates or compresses nerves in the lower back, or even the sciatic nerve itself.
– Spinal stenosis, the narrowing of the spinal canal
– This can put pressure on nerves exiting the spinal canal.
– Pelvic fracture or other trauma
– Nervous tissue can be effected by injuries of this sort.


There are also a number of factors that put you at risk for sciatica:

The condition primarily impacts people in their 40s. Changes in the spine related to aging include herniated disks and bone spurs — both of which can cause sciatica. (2,4)

Excess bodyweight creates additional stress on the spine and can contribute to sciatica (4)

Sedentary behavior, particularly prolonged sitting
Sitting for long periods of time compresses and can herniate spinal discs (1)

Sleeping on a mattress that’s too hard OR too soft
About third of our time is spent sleeping, and the wrong mattresses can contribute to sciatica pain (5)


Treatment for Sciatica

Approximately 80% to 90% of people with sciatica recover without any surgical intervention. (2)


Treatments and therapies for sciatica: (1,2)

– Daily stretching and strengthening exercise
– Heat and/or cold packs
– Analgesics for pain and inflammation
– Steroids
– Physical therapy
– Supportive and ergonomic chairs
– Rest, on a supportive mattress
– Surgical intervention

Additional Resources on Sciatic Pain

Best Mattresses for People with Sciatic Pain

How to Treat Sciatic Pain During Sleep

What Causes Sciatic Nerve Pain?


sciatica pain