With approval from my dear young friend, this is what the TCM would call "wind hives". I used to have it super bad when I was a kid, mom would warm rice wine to apply on them and make me wear sweater + long pants till I sweat everything out.
I stopped having "wind hives" after I reached kindergarten, but, they came back when my health was in the dumps 2 years ago.
They came without a warning, like I've just been bitten by a super big + hungry mozzie, the itch will continue for sometime and leave without a trace. Now, that isn't mozzie bite.
Then I recalled what mom did when I was a teeny weeny kid, and I started researching the cause of such "wind hives" and experimenting TCM on myself, and I found the relation.
It's wind and damp, but more of wind.
When our body resistance against the external environment wind lowers by the day, they would come into our system via our skin pores and attack the pathways of the weakest link.
Some people manifest in "wind hives", some have issues with painful joints, some has headache, some have bloatedness, some will diarrhea etc. The permutation can be up to 10 combined or different symptoms.
The typical way to get rid of such pathogens in our body are the usual suspects = change in diet + avoid windy places and rain (with a vengeance!) + eat the correct medicine + do the correct exercise.
I'd naturally say my Infinite Qigong. :)
Such wind-related issues must avoid outdoor exercises, for the wind can enter our body easily via opened skin pores or through our ENT when we're breathing heavily in our jogs etc.
This is also part of the reason why I open a TIQ Center = to reduce the amount of wind entering our body when we practice. Many local Qigong, Taijiquan, martial arts teachers have terrible wind and damp issues but they attribute it to old age without enough knowledge in TCM.
I've personally taught a yoga teacher, a pilates teacher and a martial arts practitioner with my Qigong to improve their health. None of their teacher is able to help their health issues, and they're older than me. None at all.
I'm now free of "wind hives", but if 1 or 2 teeny one comes back, I know what medication to take to drive the pathogen out and wrap myself better against wind and rain.