标本同治
biāo​běn​tóng​zhì

to treat both root cause and symptoms

标本同治 標本同治 biāo​běn​tóng​zhì
to treat both root cause and symptoms
in Chinese medicine, treat both the symptoms and the underlying cause of a disease simultaneously
to address both root and branch
deal with both the fundamental cause of a problem and its surface manifestations at the same time