my sister is stomack cancer patient, she has done her surgery, now his stomack is 1/3 part of normal person. she has gone under treatment for Chemo, pls guide how she care her nails, hairs and rest of body.

Is Chemotheropy complusory?
Before Surgery doctor says will let u know if Chemo is necessary or not for her. After that he said twice for chemo, after that nine times, now he said three times. Pls guide us wht is rite.