Since then it has reached more than two inches long — and a matching horn looks to be appearing on the other side.
The grandmother’s condition has left her family in Linlou Village, Henan province, baffled and worried.
The youngest of her six sons, Zhang Guozheng, 60, said when a patch of rough skin formed on her forehead last year “we didn’t pay too much attention to it”.
Mr Zhang, whose eldest brother and sibling is 82-years-old, added: “But as time went on a horn grew out of her head and it is now 6cm long.
“Now something is also growing on the right side of her forehead. It’s quite possible that it’s another horn.”
Although it is unknown what the growth is, it resembles a cutaneous horn.
This is a funnel-shaped growth and although most are only a few millimeters in length, some can extend a number of inches from the skin.
The growths are most common in elderly people, aged between 60 and the mid-70s.