what is this?

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variation of hairs from around me scalp ("miniaturization" I guess what people here are calling it) but all pretty much look the same. Even the the back and sides of my head look like swiss cheese when its wet. Albeit, not as bad as the top, but still present. when my hair is properly groomed, I'm sure its one of those things that nobody notices but me, but I feel like if I lose anymore, it is going to become noticeable. I went to the doctor, she told me to take some supplements and get some blood work done so I did about a week ago.

I've posted some pictures where I messed up my hair to exhibit the extend of the damage. If anyway has an idea what this might, be the help would be much appreciated, thanks!

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Sorry, I don't know why it didn't post this properly, this forums seems kinda junky and slapdash so I'll do it again.

Back in Febraury I had gotten a haircut and noticed it was thinner than normal. Ever since then, its gotten progressively worse for seemingly no reason. My hairline has been pretty much the same since I was about 20, its just generally thinning out at relatively fast paced and I'm confused as to why. When the hair loss does happen, it seems very sudden,. Like one day theirs hair there, and the next their isn't, and this happens periodically like every couple weeks or so. I've looked for variation of hairs from around the scalp ("miniaturization" I guess what people here are calling it) but all pretty much look the same. Even the the back and sides of my head look like swiss cheese when its wet. Albeit, not as bad as the top, but still present. when my hair is properly groomed, I'm sure its one of those things that nobody notices but me, but I feel like if I lose anymore, it is going to become noticeable. I went to the doctor, she told me to take some supplements and get some blood work done so I did about a week ago.

I've posted some pictures where I messed up my hair to exhibit the extend of the damage. If anyway has an idea what this might be so I can assess it properly, the help would be much appreciated, thanks!