My sis has problems she can't keep her self focus , headache, backache, forget very easily and she get tired alltime?

Caring sister : Noting the patients age and length of time symptoms are present will help your doctor help you more effectively. Your sister has headache, backache, impaired memory & concentration & generalized fatigue vs.Easy fatigability, & probably a few more symptoms your were not able to list. I believe these symptoms require your sister to see her regular doctor in person, asap if new/progressive.