Q. Is it permitted for a man to permanently remove hair coming from one’s ears?

A. Benayohu’s peirush on Tikunim (p. 84b) quotes Idra Zuta that one should remove hairs from inside the ear so they will not obstruct the reception of Torah and Tefilos, besides the Cabalistic vantages attained. (See Toldos Haben Ish Chai p. 95)
Horav Shlomo Miller’s Shlit’a opinion is that since it is done usually for remedy or curative reasons, it is permitted. (See question 563 in regards to shaving eyebrows and 1429 pertaining to body hair).

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a