Hi. My six year old daughter has a rash on the heels and pads of both of her feet. It is darker in color,under the skin almost like bruising, has red spots, and itches. She's had it for about a month and it started out on her right heel like a bruised looking lump that we thought was an infected sliver. Two doctors have no idea what it is, just kinda throwing steroid and fungal cream at it hoping it goes away. Any thoughts?