I brush winnie every day....but I haven't placed a top knot in about two weeks because I noticed it has been getting a little thin....when I brushed her this morning I noticed that the hair above her right eye is just gone....nothing but little tiny pitiful looking tan hair

her hair on her head has always been thin...she's always had the teeniest topknot. I'm so sad....but I also feel bad. I've always been careful not to have the band's too tight and I snip them out...I'm just very lost. I will try to get a picture on here I just have to get on the main computer and shrink one small enough to attach. Any thoughts? Is there anything I should do? Thanks in advance!