What yoga exercises can relieve back pain?

Forward folds: Forward folds and hamstring stretches are good for the back. When you stretch our legs you are also stretching your back at the same time.

21 reasons 2 do yoga: #20: Curbs neck pain. Researchers speculate that enhanced muscle tone and less tension are why one study found that participants had a significant drop in the intensity of their neck pain after 10 weeks of yoga. Ref: AARP, 5/2017.

Yoga Back Poses: : Bharadvaja's Twist (Bharadvajasana I), Big Toe Pose (Padangusthasana), Bridge Pose (Setu Bandha Sarvangasana), Cat Pose (Marjaryasana), Chair Pose (Utkatasana), Cobra Pose (Bhujangasana), Cow Pose (Bitilasana) & Crane (Crow) Pose (Bakasana). REF:http://www.yogajournal.com/poses/anatomy/back