65 Years Old I’d Good Shape. 145 Lbs, (I Was

65 years old I’d good shape. 145 lbs, (I was 200 lbs only 3 years ago). Lost a lot of weight after my 4th back surgery and 3rd foot surgery, Have had Constipation for as long as I can remember (don’t drink a lot or water, brown spots all over face (some get crusty, others bleed). Colonoscopy is clear, food allergies, sinus problems. Avid hikers always moving.