Typical symptoms of diabetes mellitus in the elderly include: polyuria, polydipsia, polyphagia, weight loss and other three more and one less symptom, or there may be no obvious symptoms, it is recommended to consult a doctor. 1. Polyuria: Elderly people with diabetes show that they urinate a lot. 2. Drinking more: Drinking more is drinking more water, and patients show that they are thirsty and drink more water more often and in larger quantities. 3. Eating more: Elderly people with diabetes eat more and get hungry faster. 4. Weight loss: There are usually no symptoms of weight loss in the early stages of diabetes. As the disease progresses, patients may experience weight loss and body thinning. Other symptoms include vision loss, itchy skin and vulvar itching. Older people who have these symptoms and suspect that they have senile diabetes need to have their blood glucose, lipids, blood pressure and other relevant tests. Elderly diabetes patients should actively seek medical attention and actively lower blood sugar treatment under the guidance of professional doctors.