Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain discolouration of thigh along with formation of red and purple dots that seems to be Petechie that are formed due to bleeding under skin..
It has happened as you have continuously taped your thighs that too very vigorously leading to inflammation of the soft tissues under skin as well as inflammation of skin..
There also seems to be rupture to minor blood vessels due to continuous thrust leading to formation of petechie.
Stinging or soreness seems to be due to inflammation..
Nothing to worry as it does not seems serious..
You can do cool compresses over the thigh..
Take anti-inflammatory painkillers like
Ibuprofen..
Apply
Heparin containing gel..
In case if you do not find improvement in a week consult a Physician and get evaluated..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora.