On Thu, 6 Feb 1997, Caroline Seawright wrote:

But, although he wasn't 'cured' ... his hair no longer grows at all.

Hey, I get to correct Kun-chan.

The whisker wore off.  His hair is normal now.

There was a lot of fuss in the story about Ranma never growing any more
hair after he runs out of hair growth, but the whisker wore off first and
this did not happen.