Vaginitis: Using benzalkonium chloride solution to clean the vulva makes peeing very spicy.

Patients with vaginitis experience burning sensation during urination after using benzalkonium chloride solution to clean the vulva, which may be related to drug irritation or allergic reaction. Benzalkonium chloride solution is often used to disinfect skin and mucous membranes, but the mucous membranes of the vulva and urethra are relatively sensitive, and improper use may cause local irritation symptoms.

Benzalkonium chloride solution is a cationic surfactant with broad-spectrum antibacterial effects. If the concentration is too high or the frequency of use is too high, it may destroy the normal flora balance around the vulva and urethral opening, leading to damage to the mucosal barrier. At this time, when urine contacts the damaged mucosa during urination, an obvious burning or stinging sensation may occur. Some patients are allergic to this ingredient and may develop contact dermatitis after use, manifesting as vulvar redness, swelling, and itching, with symptoms aggravated during urination.

In rare cases, benzalkonium chloride solution may enter the urethra retrogradely through the urethral opening and directly irritate the urethral mucosa. The urethral mucosa is more sensitive to chemical irritants, and symptoms such as painful urination and frequent urination may occur. If the patient has a urinary system infection such as urethritis or cystitis, drug stimulation may aggravate the original symptoms.

It is recommended to stop using the benzalkonium chloride solution immediately and use warm water to gently rinse the vulva. Wear loose-fitting cotton underwear to keep the perineum dry and breathable to avoid irritation from scratching. If symptoms persist for more than 24 hours or urethral discharge, fever, etc. occur, you need to see a gynecologist or urologist in time. Depending on the situation, the doctor may prescribe anti-allergic drugs such as loratadine tablets, or weak topical hormone ointments such as hydrocortisone butyrate cream to relieve inflammation. For daily care, choose a special pH-balanced lotion and avoid using strong disinfectants.