What are the sores from? Bad fitting shoes? Sores between your toes are peculiar. It could be a fungal infection out of control in which case you should see a Dr & not let other people shower in the same place as this can spread to others & is hard to get rid of. If it is fungal, you could try some over the counter anti-fungal creams but it sounds bad enough & the fact it won't go away means you should see a dr.