Nails are primarily used to protect your toes and fingers from foreign substances. In some conditions, doctors also use the state of your nails to predict your body’s total status. They primarily consist of a substance known as Keratin, which develops from a cuticle in your nail bed. Certain medical conditions can affect the way your nail grows, and lead to abnormal nails. They grow slowly, with only a few millimeters every month. According to studies, it takes at least 6 months for a nail to totally regrow and replace abnormal nails. Most nail pains are caused by temporary health conditions, such as irritation and injuries. With adequate treatment, the pains disappear and have no severe complications. However, there are some serious health conditions that affect the feeling and appearance of the fingernails and toenails. Examples of these conditions are putting and clubbing .