Nail fungus is such an embarrassing infection of the nails. It is the cracking and thickening of the nails and the surrounding skin. It is caused by fungal bacteria that are found on damp and dark places like the corner of the nails. This kind of nail infection is very common to people living in the tropics due to their warm and humid weather. There are approximately 30 million people suffering from nail fungus infections also known as Onychomycosis.