I agree with the person who suggested checking with the doctor, just to make sure you are healthy. He/she can tell you if your hormone levels and vitals are in normal range. He can also (and so can you) check on whether your nails, hair, skin, etc. seem healthy or dull.
One other point, at least in my case, is that I think I looked younger when I was heavier because the wrinkles were stretched out
I'm starting to get some comments about how I shouldn't lose any more weight. I am not at my target, nor am I below 25 BMI, but am trying to slowly get my food intake and exercise intake at the right levels to maintain.