Rashi says that being bald in the front part of the head is called: תַחַבַּגּ “Gabachas”, and baldness of the back is called: תַחַרָקּ “Karachas”. RSRH Zatzal says that the front part is the cerebrum ( תַחַבַּגּ “Gabachas”) which carries the higher dignity and the intellectual, moral, spiritual factor; and the back part ( תַחַרָקּ “Karachas”) contains the animal factor, and the love of Gashmiyus which a person has to subordinate and try to be Mach'nia (make humble) to the front (תַחַבַּגּ “Gabachas”).
We can suggest, that for some people the best Tochacha is when they remind themselves of their Maalos and their potential greatness, and the importance of their Sechel and spiritualism. (R' Gershon Liebman Zatzal has a beautiful Shmuess on the greatness of your Sechel). Perhaps they are those whose Tzora'as appeared on their: תַחַבַּגּ “Gabachas”. And others need to keep reminding themselves about the futility of being a Gashmiyus’dik type of a person, and the lowliness of Kin'ah, Ta'ava, and Kavod, which: םָלוֹעָה ןִמ םָדָאָה תֶא ןיִאיִצוֹמ take a person out of the world. Perhaps their Tzora'as would appear on their: תַחַרָקּ “Karachas”, to remind them about the lowliness of Ahavas (obsession with) Olam HaZeh. I once heard that the difference between Novardok and Breslov, was that Breslov worked positively on Simcha, and Novardok would be more involved in realizing the stupidity of bad Middos.
The more you realize the stupidity of Ka'as and Atzvus (sadness) and all those: םיִלָבַה לֶבֶה empty bad Middos (especially Redifas HaKavod), the happier you become. Every person needs a unique Derech which fits in to him. So many people are inspired by stories of Tzaddikim, watching so many Tzaddikim, and envying them. Yet, for certain types, it may be the worst thing to copy others.
