Our nails and surrounding skin are very sensitive and can be susceptible to a number of infections when treated improperly. Believe it or not, the way you trim or shape your nails has an impact on the nails and skin in regards to infections. In other words, if the nails are being poorly trimmed or filed down, a nail infection or fungus can form.
Since trauma to the toes is one of the top causes of a nail infection, improper cutting of the nail is also categorized a trauma. For example, if you are using nail clippers and cut too much of the nail off or you cut far too close to the skin, this may cause an opening to occur in the nail bed, which essentially acts as an open wound for bacteria or fungi to enter. The same thing goes for improper nail filing. If you file down the nails too fast or at a rapid speed, friction from the aggressive material in the nail file against the delicate skin will cause a burning to occur, essentially burning the skin.
It is important to take your time when manicuring/pedicuring your nails. Cutting too close to the skin or filing down the nails too rapidly can significantly increase your chance of obtaining a nail fungus or an infection, which can cause far worse repercussions.