Perhaps, I was a bit radical in my assertion or I didn't know very well how to choose the words.
The impression many people have about avoidants is that they don't care about physical appearance when they can be in the avoidant mood.
Of course, when an avoidant is forcé to interact (s)he makes his best to avoid calling the attention.

I use to do all these physicall exercises and diet bc I didn't like my body and bc I thought that if I were able to show me up my peers with a good look, all my personality problems could be solved.
Perhaps, it has nothing to do with AvPD but with a low self-steem as Orvel, pointed out.

Then, there is procrastination. For me, it was a world to go to a hairdresser's. I didn't like what I see in the mirrow. I didn't want to see myself. How the hell, I was going to let other people saw it.