The best thing what you can do if your going to a doctor.
Do heavy metal test to see if there is a problem
Do test if there is any other toxic chemical in the blood
Remember there is a lot of plastics that is designed to release a poison(reaction)
also check what she is washing here cloths and here self in etc.
Molt and fungi?
For how long she had this problem?
Do a PH test of her blood
and ask what else you can test your blood on to see what it is for your self instead of the listen to the useless doctor advice