The most common fungal problems with feet are athlete’s foot and fungal toenails. A fungus is a common mold that thrives in warm, dark, moist areas. On feet, it can grow on and between toes, as well as on toenails and soles of the feet. Different factors including, environment (heat, humidity, socks, and shoes) or weakened immunity, can cause fungal problems.
Acute fungal infections are seen more in children, while chronic fungal infections are most common in adults.