I have no doctor to refer to you but can share this with you.
this is not a 老人婦科問題.
I watched a tv program re a similar case. That lady had the whole vagina黏連, not only 陰唇黏連, caused by inflammable vagina walls for over 10 years!
she had a surgeon to open her vagina and the doctor put a penis like stuff to her vagina to avoid the walls stick together again. she also need to take antibiotics & apply cream till her vagina walls are no longer inflamed.
maybe try to not let her two 陰唇 touch each other until no longer inflamed.
Birth 15/3: W:4.2kg L:52cm HC:37.5cm
Day 09: W:4.37kg L:55.5cm HC:37cm
Day 46: W:7kg L:62m HC40.5cm
Day 82: W:~9.2kg L:~66cm
Day 112: W:~10.4kg