Not sure if this is the place to post this question but here it is. About 6 days ago, I noticed that my husband had a lump on the back of his head. It's about 1-2 inches up from the base of his neck and perfectly centered on the back of his head. It's roughly the size of a golf ball and is soft to the touch. It came up out of no where. He did not have any injury and we are concerned. I've read a lot about lipoma's but am not convinced this is one. It seems to be very rare for a lipoma to be located on the back of the head and his lump is larger and appeared more quickly than info. I read on lipoma's. Should we be concerned? Any one ever have something similar?? Any information would be greatly appreciated.