Hi,
Would a native say that?
Sure, or "Does it still hurt a lot?"
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
Native speakers would definitely say "Does it still hurt a lot?" and "Is the pain still bad?".
But, a native speaking doctor or other heath care professional would be trained to ask: "How's the pain."
John