Short for post-traumatic stress disorder. PTSD is a mental condition that develops as a result of life-threatening events and is characterized by hyperarousal, flashbacks, anxiety, and even depression. PTSD is often associated with soldiers but can also develop as a result of sexual violence, rape, accidents, and displays of extreme violence. PTSD symptoms vary by individual and there is no clear reason why some people develop PTSD while others do not. 

Studies have confirmed that cannabis can relieve the symptoms of PTSD and increase the quality of life in PTSD patients.