Vaginitis caused by decreased estrogen is called atrophic vaginitis, which can be treated by supplementing estrogen, applying antibiotics locally, applying lubricants, etc. It is recommended to follow the doctor’s instructions for treatment. 1. Supplementation of estrogen: commonly used estrogens include Tibolone and Hexestrol ointment. These drugs can enhance the resistance of the vagina, and can be administered locally or systemically. Be aware of the occurrence of adverse reactions such as vaginal bleeding and gastrointestinal discomfort. 2. Topical application of antibiotics: common antibiotics include metronidazole and ofloxacin, which can inhibit the growth of bacteria in the vagina. Be aware of the occurrence of adverse reactions such as nausea, vomiting, headache and dizziness. 3. Application of lubricants: medical paraffin oil, etc. can be chosen, mainly for patients with obvious localized vaginal dryness. To be used under the guidance of professionals.