<human>: I've been having a lot of pain in my lower back lately. What is the cause?
<bot>: The most common causes of lower back pain are poor posture, tight muscles in the lower back and hips, weak abdominal muscles, and repetitive motions like lifting heavy objects or sitting for long periods. Other potential causes include arthritis, herniated disks, spinal stenosis, sciatica, and sprains or strains. It is important to consult with your doctor if you have persistent lower back pain.