Hypnosis effects stay with you forever?

[Help]

What if someone hypnotizes you so that whenever you have a headache, and you snap your fingers, the headache will be gone. Will that stay with you forever?

So when your out of trance you will be able to do it.

[Merlin]

Yes, it can stay with you.

[Jack]

Merlin said 'can', and it would depend upon the cause of the headache
and if your subconscious is trying to tell you something new whether the effect stays with you forever.

Jack