Hello dear, The continuous craving for eating inedible substances (like raw rice) is known as Pica. It is one of the features of Iron deficiency anemia, Other symptoms mentioned in your post like hair loss & loss of weight can also be explained on the basis of that. Investigations like complete blood count & peripheral blood smear will be helpful in clinching the diagnosis. Based on the reports, management will include administration of supplemental Iron & Folic acid preparations. Also you need to take a healthy balanced diet rich in green leafy vegetables. So, kindly consult your General Physician for proper clinical evaluation. Wishing you a good health. Take care.