I have a lump on my forehead that comes and goes. It lasts for 6-8 hours then goes away, usually at night. I've been to a neurologist, neurosurgeon, vascular dr. And nobody knows what it is. I have had about 16 bumps since feb2104. I went to a dermatologist and he can't help me unless he sees it and not just my pics. The problem is that they are usually at night and the dr is not it at night. The bump is the size of a quarter. Help !!