Hanging from a bar with the toes on the floor to lengthen the spine gives many people some back-pain relief, though whether it helps depends on the source of the pain.

what you're trying to do is just create length along the spine to relieve some of that disc bulging which is impinging on the nerves again without knowing the source of your back pain it's impossible to know whether or not this will help or it won't but many people get some degree of Pain Relief by doing this