Just one-sided back and hip pain can take place over the left or ideal side which is linked to a number of causes, like: If you're able to lie comfortably with your back, position a pillow or rolled-up towel beneath your thighs to reduce the stress over the lower back. https://www.theorthopaedicandpainpractice.com/find-relief-from-lower-back-pain-with-orthopaedic-and-medical-care/