First thing's first. In order to understand something you have to know what it is.

This is the google definition. Now... Let's break it down, shall we?

According to YouTube channel DissociDID (this is where a majority of my information comes from, I will add links to their videos) DID is a trauma based disorder.

It results from an individual experiencing something traumatic at the age of eight or under.

This trauma can be severe abuse or something terrifying that makes the child think, "I can't handle this."

The experience disrupts the "natural" flow of development, resulting in one or more alter.

Alters can also form later on in life, should another traumatic event occur.

Helpful YouTube videos: