Tikkun Habris is reached when one subjugating the Primary Lust of immorality.

Lashon Hakodesh When one reaches Tikkun Habris he merits to perfect holy speech such as Torah, prayers and Hisbodedute, even if spoken in a foreign language. Since Lashon Hakodesh and Tikkun Habris are dependent on each other, the reverse also applies and a person who perfects holy speech will merit to subjugate the Primary Lust of immorality and reach Tikkun Habris. When a person reaches higher levels of Tikkun Habris and Lashon Hakodesh then his face radiates. When others look at him, it works like a mirror and they realize how they are in the steeped in darkness. This causes them to repent on their own without even the need for any rebuke.[1] Prayer Sweetness in prayer is experienced according to a person's level of Tikkun Habris[2].

[1] Hishtapchus Hanefesh 70 [2] Hishtapchus Hanefesh 71