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Zonapha Syndrome (ゾナハ病, Zonaha-byō) is a physiological dysfunction caused by third party parasympathetic dominance.

Humans have a sympathetic nervous system and a parasympathetic nervous system. When the parasympathetic nervous system is dominant, people are relaxed. Zonapha syndrome is where the body is affected by the parasympathetic nerves. When the body senses that people close by aren't relaxed, it causes an attack. When that happens, the trachea contracts, causing breathing difficulties and excruciating pain is felt in every nerve.