You may want to see if she has Vit B12 deficiency if the hairfall is too much and is recent developement.. Normally obtained through fish, egg, meat ,etc. you could try some supplements also. But please check with the doctor too.
She may also do some pranayama ( Bhastrika, Anulom Vilom, Kapaalbhaathi ) .Will definitely help.
Even if she is having any stress/ tensions due to whatsoever reasons, doing pranayam will surely help in all ways. Lifestyle, diet and mental and emotional wellbeing are very important for an overall wellbeing.