"You should see a doctor." 这是一个通用的表达，来源于英语语境下对健康问题的建议。
例句：
If you have a persistent cough, you should see a doctor.
(如果你有持续的咳嗽，你应该去看病)
You've been feepng really tired lately. You should see a doctor to get checked out.
(你最近一直感到很累。你应该去看病以检查一下)
I know you don't pke going to the doctor, but you really should see one about that pain in your back.
(我知道你不喜欢去看病，但你真的应该去看病，因为你背部有疼痛)