As mentioned – PTSD is a psychological issue that stems from trauma. When a traumatic event occurs, your body immediately begins to release certain chemicals to make you respond to the situation. Your heart beats faster in your chest, the blood runs to your extremities and your vision narrows. You can’t think straight – some inner instinct takes over. The event occurs, you suffer as a consequence and then when it’s over – you can’t seem to shake it from your mind.