Is this kind of situation the kind that causes PTSD? Death is always very traumatic for everyone, and for some people the trauma can last longer than for others. But I thought that PTSD from death was more from situations such as coming across a body, seeing someone murdered or killed, a war, etc., not from someone's general passing. Having said that, the sooner she gets help, the less likely it will cause major trauma for her in the future. I wasn't diagnosed with PTSD until I was 20, and it screwed me up big time. Being young, she may be finding it very difficult to comprehend death the way an older person can, she may not know how to properly deal with what has happened.