It is really an unfortunate situation, and in case the roots of the hairs have been lost, it may not come back. Start using Mintop Lotion 2% in the areas she has lost hair in the dose of 1.0 ml twice daily. The medication has to be applied into the scalp and not into the hair- read the instruction leaflet with the medication. If the hair don't return, you might need to think about Hair transplantation later.