Wow. This is EXACTLY what I have. My sweat starts on my neck and sometimes only my neck will sweat all night. About 6 years ago I started getting night sweats and I became terrified of blood C, lymphoma, etc. But all my blood work came out fine and two doctors told me it was normal. But it seems like I'm sweating in a different way now (not drenching sheets like I did before and not only around my menstrual cycle) and I'm scared again. But I know, logically, I shouldn't be.