So only the old nerve's damages healed?

No, I'm afraid not. The damages made by using Houjutsu's magic, even once, is permanent and will never go away.

To posses an extremely special power, one must have an enormous amount of spiritual energy. But without artificial treatments by....

....Who...?

At the current stage, it is unfortunate....

At any rate, what you need right now is rest. Don't worry about the matters of the clan. Just take it easy, and leave everything to us.