Blue mark on body. I had posted a query!

Hello Doctor, I had posted a query regarding blue marks on my body a few minutes ago. One of the doctors replied that I have got hit due to which there is mark... Actually I have not got hit by anything anywhere. The mark has come by itself n also going of it's own without any medication. Yesterday morning I felt lil pain on the right thigh when I checked it's a new mark that's coming of its own... N the one which is on arms is 3-4days old n it's changing color n going by itself.. I am concerned as these marks r coming of there own n fadding away... When I touch I feel itching n its pains badly.. but again I Don't Fall r get Hurt to get this mark... second pic, it's the fresh mark that is seen from yesterday morning this LL get darker Iike other 2marks ..