Say for example I take a popsicle stick and just gently write "hi" on back of the arm. At first you wouldn't see anything but in couple of minutes it reddens and swells and you can easily read what i've written. It swells in a way that makes what i've written look like the word is 3d. It goes away in about 10-20 minute.


Please I had this problem all my life and never yet knew what it was.

If you know what it is, please reply, thank you!