I HAVE BEEN WEARING 2 TO 3 X 200 GRM RINGS, NOT 24/7 FOR ABOUT 3 WEEKS AND HAVE FOUND A THICKENING OF SKIN ALONG THE CENTRE OF MY BALLS IS THIS NORMAL AND IS IT A PROBLEM, IT FEELS A LITTLE NUMB AT TIMES (WHEN THE RINGS ARE OFF) BUT OTHERWISE THERE IS NO PAIN OR DISCOMFORT PLEASE ADVISE MANY THANKS.