Stretching foreskin colour change

I just noticed that when I do stretches the tip of my foreskin & slightly all across my penis turns to a purple colour whereas I’m use to having a pale & red colour in certain areas. Does this mean I’m squeezing too hard because surely the point of stretching is in link with blood circulation, I am squeezing below the glands but not very hard, am I doing something wrong?

If your skin gradually returns to your previous color, than I don’t see a problem. But, if it stays this way or becomes uncomfortable I would suggest not squeezing it so hard. Start off slowly and gradually add more pressure over time to see if that helps..

Any more comments?