Which procedure can help me achieve slim hands? (photos)

I have always been insecure about my hands as a woman. They are regular sized for a woman but they’re just so puffy regardless of my size. I can’t tell if they’re just fat or if it’s fluid or muscle or whatever, becuase I’ve worn the same ring size even when I was 15kg lighter (65kg at 181cm). The only people I have ever known with weird fat hands are elderly people. Do I have some autoimmune disease causing this? What can I do to fix it? Im 25 and they’ve always looked like this.