Usually, oral ibuprofen does not affect menstrual flow, and the decrease in menstrual flow may be caused by other aspects such as emotions and diet. Ibuprofen is a commonly used anti-inflammatory drug of antipyretic and analgesic type, which can reduce the local tissue congestion and swelling caused by prostaglandins and relieve pain, therefore, ibuprofen is commonly used to relieve menstrual pain during menstruation. Common adverse reactions of ibuprofen mainly include indigestion, stomach pain, nausea, vomiting, headache, drowsiness, dizziness, lower limb edema, etc. The decrease of menstrual flow usually does not occur. If the menstrual flow is low, it may be affected by cold, emotions, diet and other aspects. Pay attention to drink more hot water, keep the abdomen warm, take proper rest, avoid straining, avoid eating cold food and keep your mood relaxed. It is also important to note that you should be cautious when taking medication during menstruation. Some medications can cause a decrease in menstrual flow and some may cause an increase in menstrual flow, so it is best to use medication under the guidance of a doctor, which is safer. A light and nutritious diet during menstruation will help you get through your period smoothly.