Hey kiddo, do you know what amnesia is? No? Okay. It means that you can't remember certain things, like something that happened a long time ago or even things that happened recently.
Now, the word "psychogenic" means that something happened in your brain that made you forget those things, but not because you got hit on the head or had a medical problem. It happened because of your emotions and your mind.
For example, let's say something very, very bad happened to you. It was so bad that your mind just couldn't handle it, so it made you forget about it. It's kind of like putting the bad memories in a locked box and throwing away the key.
This kind of amnesia is called psychogenic amnesia. It can happen to people who have gone through a traumatic experience, like abuse or witnessing something terrible.
But the good news is that sometimes, with the help of doctors or therapists, people can remember what they forgot and start to feel better.