Are you going throughout the stress of quitting smoking, a change in diet or other stressful lifestyle changes? Are you processing traumatic events? Stress and relaxation treatments can help facilitate what you're going through.
How does it help?
By recalibrating the central nervous system. How does it do that? By quieting your body's Sympathetic response (increased heart rate, sweating and stress) and promoting the Parasympathetic response... enabling the body to rest and digest.