When Rand is fighting with Rahvin, Rahvin tries to change him in LTT and in a wolf(?). So I was thinking while Nynaeve is in Tel'aran'rhiod couldn't she have thought that the old wound of Rand would disappear? If she did that he would be in this mess... Or that's what I think  ;D

Nope. Changes like that only affect the person while in T'A'R. Thus, when Moghedien threatens to turn Nynaeve into a horse, she only says Nynaeve will be a horse whenever she enters T'A'R- not that when she wakes up she'll be a horse.

Egwene's trip to Salidar is a better example of why that wouldn't work.

Nope. Changes like that only affect the person while in T'A'R. Thus, when Moghedien threatens to turn Nynaeve into a horse, she only says Nynaeve will be a horse whenever she enters T'A'R- not that when she wakes up she'll be a horse.

 

Rand was in T'A'R with his body not with his mind...

Before Egwene went to salidar she "met her toh" and was covered in bruises.  She traveled through T'A'R in the flesh and "healed" herself at the beginning of the journey.  When she left T'A'R all the bruises ruturned.

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Rand was in T'A'R with his body not with his mind...

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Rand was in T A R in the flesh. Surely that means that if Nynaeve HAD tried to heal those wounds it would have worked-except those wounds were infected with evil-the Taint? the True Power?-either way I dont think that would have worked unless they were normal wounds.