Always hungry at night may belong to the physiological phenomenon, and may also be related to diabetes, duodenal ulcer, hyperthyroidism and other factors. 1. physiological phenomenon: if the daytime diet is normal, the dinner diet is too little, too early, or after dinner exercise, it will cause hunger at night, which is a normal physiological phenomenon, you can add appropriate meals, but to avoid eating too much. 2. diabetes: when the hormone level in the body is disturbed, insulin secretion is insufficient, which will cause diabetes, if the diabetic patient has hypoglycemia, it will lead to hunger at night. 3. duodenal ulcer: if you suffer from duodenal ulcer disease, it will lead to increased secretion of gastric acid, which can be manifested as hunger pains, resulting in increased hunger at night. 4. hyperthyroidism: hyperthyroidism patients with increased secretion of thyroid hormones, fast metabolism, energy consumption is also faster, the night will be easy to produce hunger. If the night always hungry situation can not be effectively relieved, should go to the hospital in time to check, symptomatic treatment, to avoid affecting the normal life.