What Causes Severe Hot Flashes?

I have a question. I am 53 and have a meridan for my excessive bleeding 5 years ago. It lasts only 5 yrs so it's time in Feb for a removal. My question is I am experiencing a lot of hot flashes and night sweats and was wondering if I had the meridan replaced if that would help the hot flashes subside? The flashes/sweats started this placed summer. I don't need the meridan I used it for my heavy periods. If no coralation then what can I do with the intense flashes/sweats? Thanks for your help.