There are actually five different types. Normal stress (slide 1), and acute stress reactions (slide 3) comprise the first two types. Acute stress reactions, include symptoms of panic, confusion and sleep disturbances. The 3rd type, Uncomplicated PTSD, involves persistent re-experiencing of the trauma, but if symptoms include those of other mental illnesses (often depression) we reach the 4th type, called Comorbid PTSD. Lastly, Complex PTSD refers to people who experience prolonged trauma, seen especially in cases of childhood sexual abuse.