Hi, I Have Two Problems. Firstly, My Lower Back To

Hi, I have two problems. Firstly, my lower back to my butt thorough to behind my thinghs are dry and scally. Sometimes I would scratch it and you would see the dry skin falling off but it's not going away.

Secondly, between my toes itches alot. And when I take my shoes off it smells. Between the toes are sometimes white and it bursts at times when you try to scratch.

Please help me! Thanks.