Diclofenac sodium suppositories can be used for cesarean section. Pregnant women after cesarean section, after the operation will be due to uterine contraction and surgical incision caused by abdominal pain, the use of diclofenac sodium suppository in the anal area can relieve pain. The drug is administered through the rectum, directly absorbed through the rectal mucosa, the drug works faster, mainly through the inhibition of the body’s prostaglandins and other pain-causing substances, so as to achieve the purpose of pain relief. It should be noted that this drug should be used with caution by lactating women, and breastfeeding needs to be prohibited after use, in addition to active bleeding, drug allergies and other patients are prohibited from using the drug. Adverse reactions such as nausea, vomiting, allergy and fever may occur during the use of the drug. The drug should be used under the guidance of a doctor to avoid unauthorized use of the drug, resulting in adverse effects.