Lower back pain can be caused by a variety of factors, including musculoskeletal damage, a sedentary lifestyle, repetitive motions, or a pulled muscle. Regular exercise and stretching can help reduce lower back pain or prevent it from returning. Here are some stretches that can help relieve lower back pain:

1. Knee-to-chest stretch: Lie on your back with your knees bent and your feet flat on the floor. Using both hands, grab hold of your right lower leg and interlace your fingers, or clasp your wrists just under the knee. Gently pull your right knee toward your chest until you feel a stretch in your lower back. Hold for 30 seconds to 1 minute, then release and repeat with your left leg.

2. Cat-Cow: Start on your hands and knees with your wrists directly under your shoulders and your knees directly under your hips. Inhale and arch your back, lifting your head and tailbone toward the ceiling. Exhale and round your spine, tucking your chin to your chest and bringing your tailbone toward your knees. Repeat for 1-2 minutes.

3. Childs Pose: Start on your hands and knees with your wrists directly under your shoulders and your knees directly under your hips. Lower your hips back toward your heels and stretch your arms out in front of you. Rest your forehead on the floor and hold for 30 seconds to 1 minute.

4. Pelvic tilt: Lie on your back with your knees bent and your feet flat on the floor. Tighten your abdominal muscles and press your lower back into the floor. Hold for 5-10 seconds, then release. Repeat for 10-15 repetitions.

5. Seated spinal twist: Sit on the floor with your legs extended in front of you. Bend your right knee and place your right foot on the outside of your left knee. Twist your torso to the right, placing your left elbow on the outside of your right knee and your right hand on the floor behind you. Hold for 30 seconds to 1 minute, then repeat on the other side.

6. Piriformis stretch: Lie on your back with your knees bent and your feet flat on the floor. Cross your right ankle over your left knee and gently pull your left knee toward your chest until you feel a stretch in your right hip. Hold for 30 seconds to 1 minute, then repeat on the other side.

7. Back flexion stretch: Lie on your back with your knees bent and your feet flat on the floor. Bring your knees toward your chest and wrap your arms around them. Gently rock back and forth, massaging your lower back. Hold for 30 seconds to 1 minute.

Its important to note that if you have any type of injury or health concern, its best to talk with a doctor first before starting any new types of exercise, especially if a recent injury may be the cause of your pain.