4. Trigger Point Referral Pain
Trigger points are tender knots in skeletal muscles that often cause radiating or referral pain. In the case of sciatica, trigger points in the gluteus minimus, gluteus medius, and piriformis muscles are common sources of radiating pain into the back of the leg. Trigger points are located in almost all muscles in the body but usually lay dormant without referring pain. Dysfunction of movement patterns, compensation for weaknesses, or postural deficits, among many other things, can cause the trigger points in the dysfunctional muscle to become active and painful.