I would like to expound on this topic as described by the great skin disease cure doctor Dr. Tsai who resides in Japan and has clinics around the world:
Misunderstanding number 3 – Take anti-allergic, immuno-suppressive, and anti-pruritic agents as needed for treatment.
Since these internal medicines suppress the activities of metabolic wastes, the wastes will remain and hide in the body as you continue to take the drug. Also, these drugs actually become internal toxins furthering your condition and making a cure for your skin disease impossible.