Imogen was always very active from a young age, like Awen she used to wiggle round the cot lots. She'd get bruises or little marks that we couldn't explain either, i just used to put it down to bumping herself in the cot &marking easily. I bruise really easily, I'm literally always covered in bruises, my family actually asked once if Matt hit me! I think she might have just got it from me.
I've never gotten Immi checked out as they were never huge bruises/marks that caused real concern.