A similar condition to Erythrophobia is Hyperhidrosis.
This is where the sufferer has excessive sweating instead of blushing
People who suffer from hyperhidrosis probably have it just as bad as people who blush.
There are several forums on the internet of people who have Erythrophobia and hyperhidrosis arguing which condition is more embarrassing.
Obviously because I myself have had a fear of going red I believe that blushing would be much more humiliating because you can feel the heat of it and you can feel the focus of peoples attention on your face.
Whereas people who sweat, you don’t really notice it unless you touch them.
But I guess I haven’t had it so I don’t know what it’s like.
I would love to hear people’s opinions on this topic so feel free to comment.