spots on my biceps

[cockdesiel]

I've been training for a couple of years now and I've only had to deal with stretch marks on both biceps. Lately; dark spots, almost like bruises, have started to appear on the peaks of both biceps. Can someone tell me what in the hell is going on with my arms?

 

[cccp]

I wonder if it is cappilars being torn, and thus letting out some blood, giving you those dark spots. It's just a guess though, don't get upset.