I would like to know about my toddler son, which specialist should i take him to. he seems to be very traumatized , i don't know if it is trauma or maybe suffers from a condition. he screams all the time, he wakes up during the night then screams.

Confusing post: Is the issue continuous or are you asking about the night waking? There is a sleep disorder called night terrors which emerge in the first hours of sleep. They scream & struggle but do not wake easily when touched. The event ends after a few minutes. If you wake them during the event they don't know why you are there. It is not a nightmare but like sleep walking. Start with his doc.