The worst possibility is stress fracture due to poor healing.
最壞的可能性是由於應力性骨折導致癒合不良。
This is possibly related to your poor general health
這可能與你的一般健康狀況較差
You need to see an Orthopedic surgeon to either: 1) Check for and work out a plan to correct your general poor health; and/or 2) Using a MRI to check for presence of stress fracture or something else.
Of course there are other possibilities, that cannot be discussed without a proper consultation