Kanami Miko
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
Your child has an intellectual disability... it's really painful.
Are there any specific names for congenital diseases?
Or would it be severe autism?
If children clearly understand the causes and conditions of such behavior, I think there may be ways to deal with and resolve them...
Recently, it has become clear little by little that in the case of autism, it may also be caused by a problem with the state of the intestines.
“Autism, the connection between the gut and brain is clear”
http://natgeo.nikkeibp.co.jp/nng/article/news/14/9948/
I think you may be able to grasp any clues by doing a little research on the child's intestinal condition.
My son hates the word “disability.” We also believe that “disability” is one of the “diseases” that can be treated.
Please don't lose hope, and as Mr. Ryotetsu Mishina also said, the only people I can hug and protect as parents are you and your husband.
I'm sure there's a way to get better. You have also made use of institutions and systems you can rely on, and I hope you can give some thought to the above.
I wish everyone in the family happiness.
Kawaguchi Hidetoshi Gassho