My brother who is 4 and asthmatic has chicken pox all up his nostrils and in his mouth as well as all over his body. Will this harm him in any way?

Normally no ( except what chicken pox would do anyway) but as with anyone with asthma one needs to watch for signs of possible attacks, has breathing issues or attacks been happening?

Thank you and no he hasn't had any asthma attacks lately or any wheezing. So he should be fine. It's just that when I and my other brother had them, only a couple of spots came out and now this brother of mine is covered with them so I started worrying. But now that you have told me he should be fine I am not worried anymore. Thank you very much.