Please be very careful.
None of us are SJS experts and the truth is: we don't know all of the ways/places SJS can manifest.
My aunt is a long-term SJS patient, with all kinds of complications and even the doctors most expert learn a lot from her case. In other words: even the "experts" are still learning. (Her case became advanced because doctors had some ideas about SJS rashes which were not true in her case.)
You tend to handle things in a very logical manner. I have faith you'll handle this carefully/mindfully.

WC