An unhealthy sleeping position or unsupportive bed can exert excess pressure on your lower back, further compressing the nerve roots. To avoid this, try sleeping on your back with pillows beneath your knees. This position will prevent pain by properly distributing body weight and optimizing spinal alignment. If you suffer from chronic sciatica, consider investing in a mattress for back pain. Some beds are specifically constructed to prevent and relieve such pain, offering purposeful support and options fit for your particular sleeping position and body type.