Muscle Strains- Muscle related pain is one of the most common reasons for overall back pain. It can be caused by improper lifting techniques, overuse, poor posture or a sudden awkward movement or fall.
Spinal or Disc Problems- Bulging or Herniated Discs: Spinal discs are soft cushions between vertebra. Sometimes, the soft jelly like substance inside the disc can bulge out of place or rupture, putting pressure on the surrounding nerves causing back pain.
Sciatica - Sciatica refers to pain that stems from the sciatic nerve, a large nerve extending from the lower back down the back of each leg. Sciatica is not a disorder, but a symptom of another underlying problem, such as a spinal stenosis.