Benzalkonium chloride solution can be used to wash the vulva, but it needs to be diluted and should not be used directly. Before using the solution, make sure to match the appropriate concentration and dose under the guidance of a doctor to avoid stimulation of the vulva due to excessive concentration or dose, resulting in disruption of the normal vaginal environment, causing dysfunction of the flora and causing gynecological inflammation. In addition, the temperature of benzalkonium chloride solution for vulva cleaning is usually about 30℃-40℃, and it is not necessary to rinse with water after cleaning to keep the vulva clean. If there is no vulva or vaginal inflammation, it is not recommended to use benzalkonium chloride solution to cleanse the vulva to avoid affecting the normal vaginal flora with the drug and causing adverse consequences. In addition, it is forbidden to combine benzalkonium chloride solution with soap and salt disinfectants, and long-term and repeated use of benzalkonium chloride solution should be avoided in order to prevent allergic reactions. In addition, if a burning sensation or local redness or itching occurs in the vaginal washing area during the use of the medication, you should stop using the medication immediately as it may be an allergic reaction, and if the symptoms are serious, you should go to the hospital for treatment.