15 mth old, naps 1-2x daily, but at night he wakes up and SCREAMS HIS HEAD OFF (even when his eyes are closed)

sound a bit like night terrors wich all mine had at this age its like a night mear but baby kind thay seem awke but arnt the only thing u can do is sit with him and wait till its over none of mine suffer from night mares as kids and all grew out of it by the time thay hit 3 go c ur doc for more info but iam pritty shore thats what ur dealin with hope this helps