I was picturing something else.

I don't see brown "spots", but I do see lots of inflamed hair follicles.

A twenty yr old is not going to typically have "circulation" problems.

I do know that my son has run into problems with some kinds of socks. The tube socks tend to run tight we have found, and with his IT job that requires lots of sitting, he was having cold feet and pain. We found some relaxed fit socks at WalMart and he is much more comfortable now. We were surprised since his legs are not large, and still the socks were very tight.
That is what China seems to send here I guess!

The tiny red dots, occur when the skin is not getting enough fatty acids to keep it flexible and supple.
This is very common in ADHD people, or those whose diets are very low in omega-3's. In fact tests on kids were done at Purdue years ago showing 25 fold lack of omega-3's compared to omega-6's.(soybean, sunflower, oils etc)

Of course, soaps or conditioners may make this worse.
So if you cut back on harsh soaps, and use Dove unscented, and baby shampoo for a couple of weeks, you might see some improvement there too.

That strange feeling may just be dry skin, pulling on nerves, as well. If you are low in dietary EFA intake, your skin will show that clearly. If you also have acne, that is a sign you need zinc as well.
There is a great vitamin called ACEs with zinc that is made for skin problems.

You can improve your skin with flax oil orally.
I have an EFA thread on our Vitamin forum.

If you can send a better photo, I might see the brown areas more clearly.

edit to add ~~I put that photo, into my graphics program and tried to enhance it.
The circular areas show a bit more, but they are still pretty faint. I can see a ghost of
one large circle just where your sock would be if it were not rolled down.
My son gets dry patches on his arm sometimes that are circular.
He just puts 1% hydrocortisone on it for few days, and it clears up.

Your patches do resemble beginning psoriasis, which my husband has.
This may get worse with time. Psoriasis patches typically come up where there
is stimulation to the skin. Your socks would rub and qualify for that.
A dermatologist would be able to diagnosis that.
Other circular lesions are ringworm, but yours is not acute like ringworm looks.
Some people get eczema from soap residues left in clothes during washing.
So double rinsing helps. Do you have these patches anywhere else?