It sounds like you are going into menopause, I do it all night long, and it just isn't on my head, neck and shoulders either, it is my whole body! See your doctor about this, and if I am wrong, I apologize to you.
How Can I Stop Sweating From My Head?
In my case I stopped using my head but that didn't work to well in the long-term. As such I sweat, it's healthy for you! You can get a prescription but I still opt for sweating as it your natural air conditioner.