If you had AA, AT, or AU, how do you know if you have scarring alopecia? I know the only way to know for sure is a biopsy but I'm wondering how someone gets scarring alopecia and if its possible for someone who has AA/AT/AU to transform into scarring alopecia aka hair cannot regrow due to dead hair follicles. Any one know anything about this? I know everyone with severe alopecia does not have scarring because hair has grown back for people after years without it. Thanks for any…