While witch hazel is originally from North America, today this potent herb can also be found in many parts of central and southern Europe. Both the leaves and the bark of the witch hazel plant have been used in herbal medicine. It is believed that witch hazel may be useful when used in connection with colds sores, eczema, and hemorrhoids. Witch hazel has been used historically to relieve hemorrhoids, injuries, tumors, and ulcers. It has also been used in landscaping due to its attractive leaves and flowers, which bloom in the late summer. Witch hazel seeds, more commonly known as hazel nuts, are popular food items.