It is wise to study first aid in advance, so if the time comes, you can stay as calm as possible and take proper action. The following are some guidelines for different types of wounds. Cover with a bandage and keep it clean and dry at all times. Sponge area lightly with disinfectant. The main concern is that it is a small, yet deep wound and germ-laden bacteria can be pushed into the wound with the offending object.
Puncture wounds are difficult to clean.
If the object has penetrated the bone, it can abscess. This is especially risky if the nail has gone through a tennis shoe. The foam in tennis shoes is known to harbor a type of bacteria called pseudomonas, that can cause infection of the tissues. Flush the area thoroughly with water, cleaning well. Wear a clean sock and shoe to protect the area while it is healing.