This has happened a few times now. I get a bit of an itch (can be arms, legs, stomach, this time it's chest - see pic), scratch it for a bit and then overnight it turns to this?! What is it? They're like dark red blood spots, take a couple of days to fade.
Only current medical issues are gynae ones - hormonal problems and history of endometriosis which I'm currently in a medical menopause to treat.