Happens a lot, I was starting to seriously doubt my personal hygiene routine; maybe I needed to bathe or change bed linens/towels/clothes more frequently. That isn't the reason.
These episodes are sporadic, and mainly came on after I start to walk/run (generally exercise indoor/outdoor) after long periods of a more sedentary-like lifestyle. The itching is unbearable. I am frequently forced to scratch intensely because simply pausing or trying to take my mind off it doesn't help.
I also thought it was somewhat hereditary too, as my mother explained experiencing these as a young adult (and also after "trying to work out". I feels embarassing to scratch. So in public, there are feelings of near anxiety attacks. The sight of dirty water or dog faeces nearby intensifies the whole feeling as well. I hate it when I would have to walk through rain. Sounds crazy!? But the forced me to search for answers. I am determined to not let this limit my involvement in life. Even more so, because I love being outdoors.
Thank God for Google, and informative sight like these. I've identified that there a many people going through this, and I'm not a "freak of nature" for want of a better term.
I've learnt that itching and pain are related sensations due to nerve connections. And also, dilation of the capillaries, and the release of histamine during these periods of exercise after long periods of inactivity is interpreted by the brain and expressed through itching in the limbs etc. As such, I will try an over-the-counter antihistamine solution before such endeavours. And will take up further queries with a GP, though preferrable a Dermatologist for an examination to rule out any other possible factors. Sigh...