Welcome to HCM.
How old is your daughter? Generalized weakness definitely represents malnutrition
. If all her parameters have been checked and are normal, I am suspecting any emotional or psychological problems your child might be having. How is she at her studies? I suggest her diet to be monitored with protein and vitamin supplements. I also suggest to talk to her and find out what triggers these episodes. I hope I have answered your query satisfactorily. Thanks.