The other day, my little sister was having a tantrum. She was screaming and crying, and she wouldn't stop. There was nothing wrong, she just wanted attention.
I went out into the living room, where my mom was casually talking to my older sister. She acted like my little sister wasn't screaming like she was being murdered. She just sat there and talked calmly. I sat down and joined the conversation.
We talked about how my big sister was a demon child when she was young. We told stories and had a nice conversation while my little sister acted like she was being murdered in the bathroom. My mom then asked me to go check on her. I walked in, obviously, she was pretending to be hurt while she was brushing her hair. I asked her if she was okay, and she screamed, "I'm trying to brush my hair with my foot and it's not working!"
At that point, I just turned around and walked into the living room, falling to my knees laughing. My little sister just kept on screaming. We talked some more, about me trying to frame my sister for spraying food coloring on my wall when I was little. Then my mom asked me to check on her again. I walked into the bathroom again and asked her if she needed any help. She screamed "No!", and so I went back to the living room.
As soon as I walked in, my mom told me to go give her a glass of water and an ice pack, so I did. She accepted the peace offering, and I took her to her room to lay down for bed. I turned off her light and went back to the living room. She had finally stopped. I talked with my mom and my older sister some more, and then she came out to the living room and sat on the couch.
We continued to talk, and she was totally calm. So basically, if your kid is screaming and crying pointlessly, ignore them. It actually works. This experience taught me that I do not want a daughter. They are way too dramatic.