Hi Iam 54 And My Skin Is Falling Apart. I

Hi Iam 54 and my skin is falling apart. i haven't wore a tank top or sleeveless shirt for ten years. i worked all my life starting when i was a child working in tomato fields my arms were always large with muscle from carrying 5 gallon buckets full of tomatos and then i became a union industrial painter job sand blasting and pot tending throwing 100# bags of sand around then 6six years ago my home burnt to the ground and i kind of went off the grid for about 2years not caring about much that's the night my face startedtogo and then my arms and legs even when i went back to painting nothing ever came back .
i am 5'6" weigh 138 to 140 please can you help me