When I was 40 years old my doctor informed me that I had type 2 diabetes. He told me my blood sugar was 160 (the borderline is 100) and would need daily medication. He further explained it's hard to know how I contracted it, and that there is no cure.
Our feet perform a heavy workload daily. And being squeezed into tight shoes doesn't help either. Shouldering your weight around day and night, it's a relief to them when you head to bed at night, and they finally get to rest.