In general, there is no particular correlation between diabetes and the development of cancer, and there is no such thing as diabetes predisposing to cancer. Diabetes and cancer are two completely different diseases, and there is no necessary relationship between them. Diabetic patients with poor glycemic control are prone to complications such as diabetic retinopathy, diabetic foot, diabetic nephropathy, diabetic peripheral neuropathy, etc., as the disease progresses. Cancer, on the other hand, generally refers to malignant tumors originating from epithelial tissues, and there are many reasons for its development, which may be related to genetic factors, long-term exposure to carcinogenic substances and other factors. In addition, it may also be related to some lifestyle habits, such as smoking, drinking and so on, which may cause cancer. It is recommended that diabetic patients actively follow the doctor’s instructions for treatment to avoid delaying their condition.