屬足少陰腎經(jīng)(《靈樞》曰∶足少陰之脈,起于小趾之下,斜走足心。所生payment-defi.com/wsj/病者,足下熱而痛。又曰∶腎出于涌泉,涌泉者足心也,為井木。又曰∶足少陰之筋,其payment-defi.com/yaoshi/病足下轉(zhuǎn)筋!端貑(wèn)》曰∶陰脈者集于足下,而聚于足心,故陽(yáng)氣勝,則足下熱也。沈承之曰∶足三陰之脈,集于足下,足少陰之經(jīng),聚于足心,陽(yáng)勝則陰虛,故足下熱。丹溪曰∶熱從足下起入腹者,虛之極也,正所謂陰虛也)。