2. Nails
Many people do not really know the real function of the nails. Of course, it has evolved with us to play the role of scratching and tearing things but it does play a vital role in sending us messages about our health from time to time. Notice if there are any changes in the outlook of your nails such as changes in the color, texture and shape. If this is so, it is time to pay a visit to the doctor without any question.