I have been noticing my daughter's urine since she started using the toilet(started when she was 1) now she is 2.5. She always had foam, little amount of foam but those small ones and they don't go away on their own. They have always been there whenever she peed. I have compared mine I have never had any, even when I am completely dehydrated whereas she always had it. Attaching a photo for reference, sometimes two or three foam like this, But not many. Sometimes these attach at the sides and don't pop.