Horned humans are nothing new, the earliest medically documented case dates back to the 1500’s, the London Museum has several human horns in their collection and Robert Ripley made Wang the Human Unicorn famous in the 1930’s.
Human horn are not actual horns as they are not made of the same material animal horns are. Most often human horns are attributed to benign calvarial tumours, such as osteomas, and an aggressive variant of a condition known as cornu cutaneum. It is also important to note that ‘horns’ can grow anywhere on the human body but that the condition manifesting on the head only is a rarity.
China appears to produce a lot of horned people, like this man and this woman.