PTSD is a mental health condition that is triggered by either witnessing or experiencing a terrifying event. The symptoms of PTSD can include severe anxiety, chronic nightmares, flashbacks, and uncontrollable thoughts about the experience. Some people can experience or witness a terrifying or traumatic event and may temporarily have trouble coping, but with time their symptoms will improve. If those symptoms worsen, last for months or years, or interfere with your daily functions, then you could be diagnosed with PTSD. Treatment for PTSD is crucial for reducing the symptoms of PTSD and improving your level of functioning.