虚火

excess of internal heat due to poor general condition (TCM) / the prestige of another person, which one borrows for oneself

fire / urgent / ammunition / fiery or flaming / internal heat (Chinese medicine) / hot (popular) / classifier for military units (old) / Kangxi radical 86

emptiness / void / abstract theory or guiding principles / empty or unoccupied / diffident or timid / false / humble or modest / (of health) weak / virtual / in vain

an excess of heat caused by a deficiency in Yin energy (idiom)