Symptoms of this fungal infection include itching, burning, and stinging between the toes and soles of the feet. Affected people also suffer from itchy blisters, cracking and peeling skin, dryness of skin, and thick, crumbly, ragged and discolored toenails. This infection is contagious and may spread through direct skin-to-skin contact, and through contact with contaminated objects. It might also spread from animals to humans.