My husband has a swelling on the nape of his neck which he has had for several months. It is the size of a nickel. It is not at all red. It has a circle on the outer perimeter which looks whitish and is slightly raised and puckered. The inside of the circ

Hard. Hard to know without seeing this in person. The fact that it's been there a couple of months and hasn't worsened is reassurring. It could be something as simple as a kind of fungus called tinea. However, it really should be checked out by a doctor at your earliest convenience.