The are two kind of medicine: First to treat symptom and Second to target the root problem.

Example taking Panadol for headache without knowing the exact reason why your body is unwell. Taking anti-viral flu medicine without understand your body is actually sensitive to dust etc...

Unfortunately, even modern Medical sciences had "superstitous" practice on it which is an open secret. Doctors do not know the reason for some of the disease or infection but knows that such-and-such treatment can cure the symptom.