Human: Is it true that a certain kind of sock can cause a foot fungus? Assistant: 
Yes, it is true that a certain type of sock can cause a fungal infection. Fungi thrive in warm, moist environments and socks are designed to keep feet dry, so they can be a breeding ground for fungi. Socks with synthetic materials or tight elastic bands around the toes can trap moisture against your skin which can lead to an uncomfortable rash. It is important to wear cotton socks that allow air circulation and wash your feet regularly to help prevent this from happening.