Enlightenment is not pain. If you perceive it as such, you are simply realizing you’ve been in pain by experiencing something good that contrasts against the state you were in. You realize your hearth and mind are uneasy because now there’s a warm soft spot that makes the rest seem very troubled and tense by comparison, even though you were fully that way long before you noticed.
You need only allow your heart and mind to be at peace and you will fall into a balanced state. That is what enlightenment truly is.