14 year old DD's hair has always been about a normal of thickness, not really thick but certainly not thin however lately it's become very thin. It's not falling out in clumps but a lot comes out when she's in the shower and her brush is constantly covered in her. It's uneven at the ends (i think it's breaking easily for some reason) but she doesn't want to cut it as it's very long and she wants to keep it that way. No change in shampoo or conditioner, never dyed it, it could be stress related but I'm not sure. Any suggestions of what to do? Also are there any hair styles and ways of making her hair appear thicker as it's really affecting her confidence and I'm not what to do