"Sciatic" nerve pain better explained: pain down the leg broken up via each nerve root from each vertebra and where each causes sensation to occur. Feel better today with acupuncture, massage and more, to your door.
Psoas muscle attaches to your lower spine and to your thigh bone. If it's tight (sitting too much?) it pulls your lower back. It's one of the common causes of lower BACK PAIN! If you can stretch this regularly then your lower back may feel a lot better!