Intermittent dull ache in my mid back in a small spot on my spine, which is worse when leaning back on a pillow. what could this be? trigger point?

Could be ligament : Likely injury to the ligament in the spine which will cause pain on extension of the lumbar spine and pressure against the pillow Minor hairline fracture of spine could also act the same way Muscle injury and spasm are other possibilities Rest ice Back exercises and time usually tends to take care of the symptoms If problem persists get it checked by your doctor