I am sorry to hear about your daughter’s medical problems. The symptoms could be secondary to thyroid problems, very dry skin, hormonal imbalance, lupus, anxiety and stress.
Increase fruits, green veggies and water in her diet. Let her apply a good moisturizer all over her body. If the symptoms persist, she should get tested for the above mentioned conditions. Please consult your doctor regarding this. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.