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YouTube video by Dr. Nicole Cain titled "Immune System Anxiety" describing how immune-system-related anxiety can begin in childhood, puberty, or after a major trauma/trigger. Symptoms commonly involve immune-system manifestations such as allergies, chronic nasal congestion (rhinitis/sinusitis), seasonal or cyclical headaches, and cold/flu–like symptoms that recur during the premenstrual (luteal) phase when estrogen and progesterone fall.










