Explanation: The Gemara here implies that it can be healed, as is implied in Shabbos (78a), where the Gemara says that we color the eye for Bruksi.

Question: This is difficult, as in Bechoros (38b) this is considered to be a permanent blemish.

Answer#1: Rabeinu Yitzchak says that anything that does not go away by itself or through a simple medical treatment is considered a permanent blemish.

Answer#2: Alternatively, it is possible that the treatment referred to in our Gemara and in the Gemara in Shabbos is applicable in the early stages of the disease. However, in its later stages, it is incurable.

Explanation#1: This means teeth, as Rashi explains here.

Explanation#2: It does not mean gums, as Rashi explains in other places such as in Avodah Zarah (28a).

This is apparent from the Gemara in Pesachim (113a) which states, "Do not uproot Kacha" (meaning gums). In Chulin (59b) as well, the Gemara says, the "Kachi and Shini" of men fall out, and this cannot be said about gums.