Post-traumatic stress disorder
PTSD is different from traumatic stress, which is less intense and shorter, and combat stress reaction, which happens to soldiers in wartime situations and usually goes away. PTSD has been recognized in the past by different names, like shell shock, traumatic war neurosis, or post-traumatic stress syndrome (PTSS). Note that today, the term shell shock is mostly used for such conditions, in connection with World War I.