Dear M. C,
I have absolutely NO knowledge of Kawasaki, but... I thought I would try to help with one problem you had mentioned?
I know this advice is going to sound strange... but, it really does work.
A long while back my ex-husband (when we weren't ex's).... he had a friend, who took care of her grand-daughter an awful lot. The grand-daughter would have bouts of diaper rash, and the pediatrician had recommended 'BAG BALM'... they sell it in some pharmacies, and in another really 'odd' place.... wal-mart.... carries it...(in all places.... (the pet department)! Why? It's not slated for 'human use'.... it's marketed toward farmers and their cows, to cure rashes and problems on cow utters!
It comes in a green cube-like square (old-fashioned tin).... it looks a little like vaseline when you open it up.... but, I swear to you, it can even clear up a bleeding rash in a day of continual use (at every diaper changing).... it's awesome and grand stuff!
I truly hope that advice helps!
Another thing you can try is oatmeal baths.... but, it's time consuming, and it doesn't work as fast!
btw, I'm a mother of 5 so I really do have a lot of experience, and I'm not lying to you.... look for the stuff, it's awesome!
Sincerely,
Becky