bubbles preceding urination

I did a quick internet research on your question. What came up was a doctor saying that bubbles in urine indicates a urinary tract infection, especially in diabetics, or a connection with the bladder and bowel. Either way, take him to the doctor and check if everything's okay.

I have heard that bubbles or like a foamy appeance is protein

Hi,

Since he is only 11 years old it would be wise to take him to his pediatrician and check what is going on.

It could be that he is suffering from urinary tract infection but you can’t know this until your doctor confirms this.

Also it could be that this is absolutely nothing. it has happened to me (I have problems with urinary tract so I am freaking out very often) that my wife has changed the toilet cleaner and this one was making more bubbles than the previous one so I got freaked that something is wrong again.

You can check this before heading to the doctor’s office and if it isn’t the cause of the bubbles than the doctor will give you better solution.