My friend has been having these weird scratches, which do not hurt, and come spontaneously. One day, we were in school, and walking home, she started saying "my legs feel weird" but they didn't hurt her. Until, I looked down at her leg, in was bleeding. The next day, we were walking to school when my friend showed my her leg. They was no sign of blood, or any cuts. There was only three, red dots : all placed to form a triangle. She also has red scratches around her limbs (none on her chest). Please can you give me possible answer so I can see what is happening. Thank you for your contribution :)