When the spinal cord is injured, the healthy tissue surrounding the damage plays a surprisingly active role in the healing process. Researchers recently discovered that special support cells in these uninjured areas completely change their behavior to help manage the crisis. These support cells release a specific chemical messenger that acts as an instruction manual for the nervous system’s local immune cells, telling them exactly how to safely digest and clear away the greasy nerve debris left behind by the injury. When scientists blocked this chemical messenger, the immune cells became overwhelmed and essentially “choked” on the waste, preventing the spinal cord from repairing itself and recovering lost physical functions. Importantly, this exact same cellular teamwork also appears naturally in human nerve diseases, meaning that finding ways to boost these helpful support cells could eventually lead to powerful new treatments that help patients recover from devastating spinal cord injuries.