I had a spot on the back of my head near the right ear. After a few months I noticed that all the hairs of that portion has fallen off and there is a spot that is whiter than my complexion. Now I see that there is also a spot in the back of my head and near my ear (front side) the hairs have completed fallen off and it has taken shape of circular spots. It is spreading day by day. Please I need help to cure this.