I thought I had answered this question for you before, but if I didn't I apologize for that.
Hyperhidrosis is just excess sweating and sweatiness. This is MBS. Athlete's foot is due to a fungus that grows and causes itching and a rash. That is not MBS, but fungi grow more readily when there is hot and humid conditions, like when one is more sweaty. That is why people with hyperhidrosis have a higher rate of fungal infections on the skin.
Does that help?