I have a very large bruise on the top of my foot/ankle (and it's sore) but no recollection of doing anything to get it, then when I checked I have three other bruises, two on my legs and one on the inside of my arm.
I haven't fallen, no one has hit me, surely I would notice if I banged myself hard enough to cause multiple bruises?
Anyone have any ideas on spontaneously appearing bruises?