Hello ?? The situation is that the child is crying even though they're…

Hello ?? The situation is that the child is crying even though they're not crying, they're screaming, specifically screaming in a way I don't know what they're doing. And it's impossible to calm them down. Such an outburst lasted for an hour and a half, and suddenly he stops and disconnects... In general, lately he's been restless and having fits for an hour. And the strangest thing is that they scream and suddenly stop as if nothing had happened. Has anyone experienced this?