I was recently diagnosed with Type-II diabetes; I experienced the following over the past couple of years before (thankfully) acquiring the foresight to get myself tested.
(i) Excessive thirst
(ii) Insatiable hunger
(iii) genital itching
(iv) back pain
(v) spots around the knee area of the legs (the doctor said that this is not due to diabetes in my case; the spots look like those characteristic of Schamberg's disease)
(vi) pain in the heels that is mitigated only when wearing comfortable sneakers