The re-experience (flashbacks) and hyperarousal responses of PTSD begin when sensory stimuli associated with the time of the trauma activate the amygdala. Sounds of cars, specific smells, similar weather, and news footage unconsciously reactivate fear memories from that time. Prolonged Exposure Therapy (Prolonged Exposure Therapy) or EMDR are psychotherapies that gradually weaken fear responses by exposing patients to these triggers in stages. Dongjedang takes an approach focused on lowering the overly sensitive reactions themselves, which are often caused by Simdamheopgeop (deficiency of the heart and gallbladder). By using herbal medicines that nourish both the mind and spleen/stomach to strengthen the heart energy, dissolve phlegm, and cool the heat of the phlegm with calming herbs, thereby lowering the nervous system's baseline arousal level, the reaction to the same triggers becomes less intense. Combining psychotherapy with traditional Korean medicine helps enhance treatment efficacy and shorten the duration of treatment.