Our difficult child daughter has foot problems. She is overweight and I don't know if this has anything to do with it (perhaps it make s a small contribution). The primary problem is that she usually wears what we call "flip flops." She rarely washes her feet as well. She has dry skin on her feet. She gets callouses. Her feet are often dirty. Lately, those callouses on the back are cracking BADLY. I have often given her creams, socks, vasoline, soap (of course) and she loses them. About every 8 weeks, we take her for a pedicure. They are always flabbergasted. Last time I made the offer, she declined. So, it's been a long time. I saw her feet yesterday and I'm worried. They are cracked badly. What is going on? I've never seen anything like this. What medical problem might be developing? The cracks are bad. Anyone have any experience with this? Is there a medication I might purchase for her? Thank you.