Endocrinology department. Weight-reducing needle is a drug-induced method to lose weight, which mainly achieves the effect of losing weight by injecting weight-reducing drugs. Endocrinology belongs to the category of internal medicine, which is mainly responsible for the clinical diagnosis and treatment of diabetes, osteoporosis, obesity, gout, lipid metabolism disorder, pituitary gland, thyroid gland, gonad, adrenal gland and parathyroid gland.