The Stress is held in the body by cellular memory that can be more precise than "mental" memory due to the fact that the mind is continually exposed to misinformation and "forgetter" commands, such as "Just move on, Time heals all wounds," or simply, "Forget about it."
Biofeedback and other gentle methods of untangling the confusions of past traumas can relieve much held-in stress and free up your life. It did for me and it can so for you, too.