Suddenly lost a few pounds is not normal, may be diabetes, digestive diseases, neurological disorders, psychosomatic disorders and other factors. 1. Diabetes: diabetic patients with insulin deficiency, easy to cause the body to lose more energy, thus suddenly lost a few pounds of this phenomenon is not normal, the patient is usually accompanied by drinking, urinating, eating and other symptoms. 2. Digestive system diseases: common gastrointestinal diseases, liver and gallbladder diseases, pancreatic diseases, etc., these diseases often make the patient’s nutrient intake is insufficient, food digestion and absorption disorders, etc., the situation of a sudden weight loss of a few pounds, generally speaking, is not normal. 3. Neurological diseases: common medullary paralysis, myasthenia gravis, etc., which can easily impair the patient’s swallowing function, resulting in difficulty in eating, and thus suddenly lose a few pounds. 4. Psychiatric disorders: such as anorexia nervosa, depression, etc., may appear refusal to eat, anorexia and other behaviors, resulting in weight loss. If the patient suddenly lost weight for unknown reasons, or even persistent weight loss, it is recommended to seek timely medical care to improve the physical examination, so as to avoid inducing adverse consequences.