Diffuse thinning may or may not be uniform thinning. See the distinction in a recent commentary I published in the HT Forum: https://newhair.com/pdf/Kumaresan-Muthuvel-Bernstein-Rassman-Commentary.pdf You need to see magnified views of your hair in different parts of your scalp. By going to Amazon, look for hand microscopes and for under $50 you can get good digital photos of your scalp at the hair roots. Then get a map of the head from Google, label each area you photo (a, b, c, etc) and then send them to me and I will look at them and give you a diagnosis. Be sure to include your donor area from the back of your head.