@PlayerOneReady, my long hair comes out a lot as it is - in the shower especially. We always find loads in the carpet when hoovering. But I don't think I have patches.
I've been doing keto/LCHF for nearly two months and haven't noticed it worsening, but I was talking about hair falling out with some other mums the other day, and one mentioned that it can be linked to lack of protein in the diet.
This may seem odd when thinking about keto, but actually, for me it would be possible. I struggle to eat 'enough' protein, not being a massive meat-eater, and of course keto is about high fat more than high protein (too much protein can kick one out of ketosis anyway). So I'm trying to up my protein to what would be considered normal/healthy levels, for general health, but also with this in mind.
This could be completely irrelevant to you, especially if you're eating plenty of meat, but just in case you're more of an eggs-and-cheese-and-a-bit-of-fish keto-er, I thought I'd share.
Hope it sorts itself out.