It has often been said that Queen Elizabeth became bald at the age of thirty, but in fact there are references to her having her own hair well into her sixties. In the 1580's she gave a lock of her now graying hair to Philip Sidney (which is still on display in Wilton House, Wiltshire) and only a few years before she died,  Robert Devereux, Earl of Essex, burst into her bedchamber without permission and saw the aging Queen with "her hair all about her ears". Elizabeth's high forehead in her paintings may have been natural, may have been exaggerated by the portrait painters who knew that the Elizabethans considered a high forehead to mean intelligence, may have been due to that fact that the Queen wore wigs and may have shaved the front of her hair to make them sit more easily, or the Queen may well have had some hair loss due to the lead in the "mask of youth" make-up that she wore on her face. But even if she did lose some of her hair in this way, and it is by no means certain that she did,  the Queen was never bald.
 

See Elizabeth Jenkins' passage on the legend of Elizabeth's baldness