Ichtayosis
An unusual genetic condition in which the skin is scaly, dry, thickened, and darker than normal due to unusual production of keratin. Ichtayosis generally arises at, or shortly, after birth, and generally gets better during childhood. Most frequently affected are the arms, thighs, and backs of the hands.
Emulsifying ointments and lubricants can be applied to help relieve the dryness, and bath oils can also be used to moisten the skin. Ichtayosis can also be treated with the retinoid drug acitretin according to allopathic medicine.