Hi. Greetings. This looks like intertrigo. This is often related to humidity, tight or occlusive foot wear worn for long hours, excess sweating and accumulation of moisture. You'll need to keep the area dry - you can separate the toes by keeping small bits of tissue paper between the toes to prevent moisture accumulation.. You'll need to see a dermatologist for confirmation of infection and treatment with antifungals creams. DO NOT USE OVER THE COUNTER CREAMS LIKE BETNOVATE GM OR PAN DERM OR QUADRIDERM... this will only prolong the infection. Hope this helps.