Losing all 4 of grandparents before age 12, can it cause depression at older age as 20? what can lose of family member health prob can occur?

Yes, it can: Losing four gradparents can cause a complicated ptsd with depression. The body's and brain's chemical response in grief is identical to that of post traumatic stress disorder, which can occur as a delayed reaction later in life, especially if triggered by something similar such as the loss of a boyfriend or anyone you may know. Please see your family doctor for a physical ; refer to a psychiatrist.