There are certain types of people who are hairless from birth, this can be due to scalp issues and can be genetic. There are many diseases that can affect the hair and scalp, but among the best known are hair loss and dandruff. There are many possible causes of these diseases, for example, hair loss can be an iron deficiency, it can be the consequence of other diseases such as diabetes or tuberculosis, it can also be the consequence of an imbalance hormones or a scalp infection...