I had my tonsils removed at eleven years old. I didn't know why then, and I still don't now.
I suffer quite a bit now from allergies (I'm not sure how related to this it is, and I guess I've no way of knowing really).
I remember being really scared, and the surgeon playfully telling me that I'd be fine, I'd be asleep through the whole thing and would wake up back on the ward (with ice cream!) and barely even know it was over. I was told that I should count to ten while they issue the anaesthetic. I was unconcious by seven.
The next thing I remember is waking up really disorientated, in a different room, and could only see blurred grey shapes. I've never been in such pain before or since. I shut my eyes and bit down hard into the white hospital pillow while screaming.
An unfamiliar voice shouted angrily at me that I wasn't supposed to be awake yet. I opened my eyes as the pillow felt wet only to realise that it had turned completely red. It felt like someone had cut my throat out.
My mother (having been advised that I'd be asleep for hours) had gone to get a coffee and was completely unaware that any of this had happened. For reasons that were never explained, the nurse wouldn't take me out of the room and my mum wasn't informed until a couple of hours later when I was wheeled back out onto the ward.
I had to stay in hospital for another two days as a result of what went wrong (haven't a clue to this day what that was exactly), and was bloody terrified.
Anyway, long story short is that when the bleeding eventually stopped I finally got some ice cream. It was warm, it tasted bad, and it was entirely not worth it.
In summary, surgery could well be correct for you and/or your child if a competent professional has analysed and considered your case and health outcomes, but I don't recommend that anyone allow themselves or their children to be mutilated without any explanation at all in exchange for sweet treats.