Sitting can be bad for lower back pain, especially if you sit with an incorrect posture. Whenever you’re sitting on a chair, it creates backpressure and dramatically compresses the spinal discs in your lower back. When the discs have been compressed for too long, it causes pain in the lower back. If you have preexisting lower back pains from an injury or overuse, sitting will often make lower back pain worse. Suppose you don’t have any preexisting conditions causing lower back pain but are now required to sit for long periods of time frequently. In that case, lower back pain can develop and worsen unless you take proactive measures to reduce stress on your lower back.