Foods good for enteritis

My daughter seems to have enteritis.

I went to the hospital yesterday afternoon because I was in so much pain.

Went to the emergency room again in the evening and had various tests.

In the end, they say it's just gastroenteritis, so I wonder why they were in so much pain...

Fortunately, I vomited once yesterday morning and that's it.

There was no diarrhea from the beginning.

I drank plenty of water and also ate a little steamed egg for lunch.

They still have stomach pain, nausea, and headache.

I'm thinking of giving rice porridge and seaweed soup for dinner.

Is seaweed soup okay?

Are bananas okay again..?

This winter, the children are getting sick one after another too often.

Flu, pneumonia, sialadenitis, hip joint inflammation—so many different ailments.

I'm so overwhelmed ㅠㅠ