@daesanghyeokie Most hotpacks salt and water
Salt is not normal table salt but calcium chloride (which is a salt in chemical sense).
Calcium chloride will cause irritation and redness, because it is highly reactive with water.
I think he will likely get minimal burns because the liquid is hot.
@sadburntoutkid@leefakerism Whether it is rumour or truth, in each scenario we should be happy for them and keep their private things private.
There is nothing reprehensible to mention how someone reacts to each outcome.