"Of course I clean her!" The Doctor frowned and polished the console a bit with his sleeve right then, only then looking at John. Nosebleed? Sure, he knew enough about humans to not exactly freak out about that, but they had just left a quarantine zone... He quickly closed the distance between them with a few strides and stopped next to John, putting a hand on his shoulder to steady him, just in case. "Put your head back, before you drip all over yourself. How are you feeling, John?"

Since the Doctor was tall enough to check his eyes even while John leaned his head back he did as much, instantly tightening his grip on his shoulder. Uh-oh. Better not to alarm him, he could still be wrong.

"Come with me, I'll give you an ice pack."