Hi there, my boyfriend has had a lump on the back of his neck for quite a while now (at least 5 or so months) and it isn't going away.
It's gotten slightly bigger, but isn't currently growing. It's the same colour as his skin but there is a slight discolouration on one side.
He went to his doctor and was told it was just a cysts but we aren't too sure whether to believe him as he has misdiagnosed things in the past. Today it started hurting (before he couldn't feel it) and there was some blood coming out.
I really think you should seek for a second opinion, as it doesn`t look like a cyst to me. However, I`m not a doctor, thus I cannot judge anything. But please, make an appointment with another derm and find out what is it!