Whenever we are faced with an overwhelming experience that we sense as potentially disintegrating, we have the ability to suspend it and "freeze" it in an unassimilated, inchoate form and maintain it in that state indefinitely, or for as long as necessary ~ Ivor Browne
The small intestine meridian is commonly known as the karate chop point or the side of hand point in EFT. Tapping this point continuously corrects psychological reversal, which is any block that we may have, conscious or unconscious, to healing.
The small intestine is where we absorb and assimilate the nutrients from our food. If we carry across the metaphor of assimilation to our experiences and feelings, I don't think it's any surprise that this point helps us to 'digest the indigestible' or unfreeze an experience. Anything that remains unexperienced or undigested, whether it's food, an experience or a feeling, causes indigestion.
A hurtful remark can give us the physical sensation of not being able to 'take it in', stomach it or absorb it, just as much as the food we eat. What we don't assimilate or digest can never be eliminated or let go of. The frozen energy needs to be freed up first, so it can move and be released. I have found tapping on this point alone can give huge relief. EFT shortcut diagram and procedure.