35 yrs male. Got candidal infection on penis 8 months back. Treatment done. Doc suspected diabetes. Ignored docs advice. 2 months back again candidiasis. Brought glucometer at home. Fbs 450 mg / dl. Ah! confirmed diabetic. On metform in 500 gliclazide 4 mg twice a day. Hyperglycemia controlled. But persistent pain in the heel of my left foot from about 4-5 months. Can you suggest why it happens? I worry that may be I am diabetic from 1 yr or more with no treatment. Had it any bad effect on my body?