That'll be what the problem is.

An outermost, “ballooning” membrane was seen to form dilated vesicles above the subtendent “armour” layer.

[O]ne basic economic problem defeated the ingenuity of even the adroitest Italian bankers – the balance of payments. It often happened that the exchange of commodies was so uneven that there were no funds in Bruges to settle accounts in Florence.

The same [Sorell] water withdryueth impetigines.