my daughter is 12 yr old, some days she is not feeling well she feel weak n dull so plz tell me how can I do

A. hi it happens because of stress or nutritional deficiencies. so please give homemade healthy and well blanaced diet avoid giving outside food items frequently. give curd,butter , buttermilk etc more keep your child well hydrated avoid giving RO water give sunlight atleast 20 minutes a day