Post traumatic stress syndrome, also known as PTSD, is a mental disorder that can develop after a person experiences a traumatic event. PTSD can cause a variety of symptoms, such as flashbacks, nightmares, and avoidance of certain situations. There are various synonyms for PTSD, including post traumatic stress disorder, posttraumatic stress reaction, shell shock, and battle fatigue. Each of these terms refers to the same condition and the symptoms that it causes. While PTSD can be a challenging condition to manage, there are various treatments available, such as therapy, medication, and support groups, which can help individuals with PTSD improve their quality of life.