Hi thanks for writing to healthcare magic. Dry skin
on fingertips can occur due to; 1.Eczema
. 3.Vitamin deficiency
. 4.Fungal infections. 5.Allergies to detergents,soaps ,chemicals etc. It will be better to consult a dermatologist
and take treatment from him.As far as my knowledge is concerned there is nothing like cryptosis of hands. You can just ask her to apply plenty of emollients and avoid harsh soaps.