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Different Types of Pain along the Sciatic Nerve

The patient’s pain and specific sciatica symptoms can usually be traced to where the injured/irritated nerve originates in the lower back. Typical symptoms include:

• Sciatica from L4 nerve root 
  Symptoms of sciatica stemming from this level, the L3-L4 level, in the lower spine may include: pain and/or numbness to the medial lower leg and foot; weakness may include the inability to bring the foot upwards (heel walk). The patient may have reduced knee-jerk reflex.
• See All About the L3-L4 Spinal Segment
• Sciatica from L5 nerve root 
  If the L4-L5 segment is affected, the patient may have weakness in extension of the big toe and potentially in the ankle (called foot drop).
  Symptoms of sciatica originating at this level of the lower back may include: pain and/or numbness at the top of the foot, particularly in the web between the great toe (big toe) and the second toe.
• See All about the L4-L5 Spinal Segment
• Sciatica from S1 nerve root 
  Symptoms of sciatica originating at this L5-S1 level, which is at the bottom of the spine, may include: pain and/or numbness to the lateral, or outside, of the foot; weakness that results in difficulty raising the heel off the ground or walking on the tiptoes. The patient may have reduced ankle-jerk reflex.

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