My sister is very weak physically she eats only 2 roti whole the day .she always feel tired her weight is less and sometimes she feels vomiting I visited to many doc but ayurvedic and allopathic but there is no effect on her .all his test report like blood n thyroid and urine are normal .we r unable to understand that what is the cause behind it .she is only 22 years old .her legs remain cool nd remaining body at normal temp .she always feel a lil bit cold when we turn on the fan. She stopped eating all junk food we r giving apple and other fruits to him .kindly suggest something how she will gain the weight and became healthy .we try banana and apple in The morning but no effect she gets bored with it.