Have her check Thyroid Disease Symptoms, if she has them, get her thyroid tested, Hypothyroid causes Dry Skin, hair etc make sure she gets the following tests, Tgab, Tpo, TSI, Free T3 Free T4 and TSH The first two are for Autoimmune Hypothyroid (Hashimoto's Thyroiditis) The third is for Hyperthyroid Autoimmune Graves Disease, Free T3 is the active thyroid hormone, Free T4 is the Thyroid Hormone (Pre Conversion) and TSH Is Thyroid Stimulating Hormone.