The reasons why people gradually lose weight are as follows: 1, diabetes, there will be a dry mouth, drink more, urinate more, accompanied by weight loss, monitoring the fingertip or venous blood, blood glucose can reach the diagnosis of diabetes. 2, hyperthyroidism, also an endocrine disease, often palpitations, excessive sweating, hand tremors, increased stools, and other symptoms, accompanied by weight loss. 3, tumors, some chronic tumors of malignant depletion can lead to weight loss. 4, some drugs cause, cause metabolic increase of drugs can lead to weight loss. 5, malnutrition, such as recent eating less or have digestive tract lesions, resulting in poor diet, leading to weight loss. 6, other reasons, such as mental stress, depression, etc., can also lead to weight loss. If you lose weight gradually, it is recommended to go to the hospital to clarify the cause of the disease.