Esto dolerá
This show just used this phrase for "this is gonna hurt", seems wierd, I usually think of hacer daño or lastimar to cause pain, even emotional, but I guess since doler is to feel pain this would work? Seems a bit odd to me.
2 Answers
Doler does mean to hurt. Me duele el estómago, me duele la cabeza. Esto dolerá sounds right to me.
This is probably something being said about pain about to happen at the moment, so it would be more natural to say "Esto te va a doler."