Hello, my four year old had a ring Like purplish bruise on his lower leg a couple months ago. It was no larger than a dime. No know trauma, not c/o pain or itch. No fever, no fatigue. Now he has a bruise in his Lowe back, kind of over his hip bone. He is in the 90% for ht and 35% for weight. He does c/o leg pain a lot and isn t very coordinated. He just had a physical and I was told he is very healthy. I m concerned that these bruises could be signs of an underlying condition but don t want to put him through a series of tests if it s not needed. Do you think ring like bruising could be caused from pressure since he is so skinny?