You DO need to learn about this challenge before you commit to a long term marriage relationship. These individuals have challenges that may be too difficult for you to deal with long term. Also, it’s important to know it’s hereditary so if you have children it’s very possible that you have a child with this challenge.
You can find some information on YouTube.
It’s very possible he was abused due to this challenge rather then helped so he can thrive better so he may have trauma challenges.