How long for pulled facial hair to grow back?

My boyfriend has a full beard and part of it got ripped off his face. It left a smooth bald spot, which still hasn%26#039;t grown back yet. This happened a month ago, and we are starting to get worried it will never return!|||it could take between 6-8 weeks and there is a small chance it might come in patchy or not at all.. but it should !|||Why would you do that to him!|||In some instances it is known that hair may not grow back