Hi, The lesion in web area between little toe and fourth toe woudld be most probabably candidal intertrigo. It is a fungal infection caused by candida albican. This is a common site for this infection. It is a contagious skin disease. Blood tests may be done to rule out DM,ANAEMIA,HIV,internal diseases,nutritional deficiencies and IMMUNOCOMPROMISED CONDITIONS. You consult dermatologist for perfect diagnosis and treatment. I advise in patients having such disease following treatment. 1) to take antifungal like ketoconazole daily one tab for 2 to 3 weeks 2) to take antihistaminic like levocetirizine 5 mg at night 3) to take short course of antibiotics 4) to apply antifungal cream like clotrimazole cream twice a day 5) to cleanse the area with dettol containing water You might improve after few weeks of treatment. I hope you got my answer. Thanks. Dr. Ilyas Patel MD