You can say that someone is in hysterics or is having hysterics when they are laughing loudly in an uncontrolled way. He'd often have us all in absolute hysterics
If someone is in hysterics or is having hysterics, they are in a state of uncontrolled excitement, anger, or panic. I'm sick of your having hysterics, okay?
If someone is in hysterics or is having hysterics, they are in a state of violent and disturbed emotion that is usually a result of shock. It was such a shock I had hysterics = hysteria