I've been having this problem on and off now for the past couple months.
On days where I exercise or sweat profusely, my skin gets itchy, mostly on on my legs and arms where there is more hair, however the itchiness randomly spurts out all over my body. When I try to sleep at night time after a hard night of intense exercise I wake up sometimes a bit sweaty and extremely itchy. Sometimes so bad that I can't fall back asleep unless I get out of my bed and go to the bathroom to douse myself with cold water. I also notice in some extreme cases where I sweat a lot, I get very small red dots appearing at the base of my hair follicles; however these only appear when I'm scratching a lot. They are mildly itchy. There is no puss or anything that comes from these red dots, and after a few hours , they disappear on their own.
Recent Medical History:
Also, about a month ago I was also diagnosed with Impetigo, however this was a completely different case and different symptoms were involved. I'm only mentioning this as a recent medical history so that you guys are aware. I got the Impetigo from my martial arts club where a couple other members also were diagnosed with Impetigo. I was given an antibiotic for my Impetigo called Keflex. The impetigo disappeared within 2 weeks of taking the antibiotic. However I had been having these itchy skin symptoms a couple months before the Impetigo.
I appreciate any input, and would love to hear about similar cases and experiences and the steps taken. Thanks for reading.