"Did it hurt?" "Not at all - I didn't feel a thing." “疼吗？”“一点也不疼，什么感觉也没有。”
I must have run into something, given the bruise, but I didn't feel a thing.
The injection won't hurt at all. You won't feel a thing.
I was badly injured, but the shock meant that I didn't feel a thing.
He can walk over hot coals apparently without feeling a thing.
See also: feel verb (EXPERIENCE)