Why do disorders like schizophrenia or bipolar typically only appear in adolescence and not childhood?

Question

For example, schizophrenia typically appears around the 20s, but is rare in childhood. Why is it so rare to see in childhood?

In: Biology

Answer 1

I have a side question. In middle school I had an angry demonic sounding voice in my head telling me horrible things like nobody liked me, and i should kms. It went away eventually. Can schizophrenia show up and then leave?