Uniform body weight is defined as a body weight with a body mass index between 18.5 and 24. Body weight is an important indicator that directly reflects the nutritional status. Common clinical abnormalities in nutritional status include malnutrition and overnutrition. 1. The common causes of malnutrition are as follows: (1)Obstruction of ingestion; (2) Digestive disorders; (3) Increased consumption. 2. Excessive nutrition: the main manifestation of weight gain, when more than 20% of the standard body weight, known as obesity, can also be divided according to the body mass index: body mass index = [body weight (kg)/height squared (㎡)]; according to the WHO standards: greater than 30 that is, obesity. It is recommended to consult the relevant professional doctors or pharmacists under the guidance of weight control, to avoid self-treatment or medication to cause adverse consequences.