What causes vaginal blisters?

Some blisters may occur in the vagina of female friends. The occurrence of this symptom is due to many medical factors. The most common one is bacterial vaginosis. Once it occurs, the condition will gradually worsen over time, eventually leading to vaginal itching or abnormal leucorrhea and other symptoms, which will affect the patient's normal life.

1. Bacterial vaginosis

In a normal vagina, lactobacilli that produce hydrogen peroxide are dominant. Bacterial vaginosis is an endogenous mixed infection caused by a decrease in Lactobacillus and an increase in Gardnerella and anaerobic bacteria in the vagina.

2. Candidal vaginitis

(1) 80% to 90% of pathogens are Candida albicans, which grow easily in an acidic environment and are diphasic (yeast phase and hyphae phase).

(2) The patient's vaginal pH is 4.0-4.7, usually <4.5.

(3) Conditionally pathogenic bacteria (yeast phase → mycelium phase).

(4) Common causes: pregnancy, diabetes, and large-scale use of immunosuppressants and broad-spectrum antibiotics.

(5) Other contributing factors: gastrointestinal Candida, wearing tight synthetic underwear, and obesity.

3. Trichomonas vaginitis

(1) Trichomonas vaginalis grows best in a humid environment with a temperature of 25℃ to 40℃ and a pH of 5.2 to 6.6.

(2) The vaginal pH changes before and after menstruation, becoming close to neutral after menstruation, making it easier for Trichomonas to reproduce.

(3) The vaginal pH of patients is generally between 5.0 and 6.5, and most of them are > 6.0.

(4) Parasitic on the vagina, urethra or paraurethral glands, bladder, renal pelvis, male foreskin folds, urethra, and prostate.

(5) Often coexists with other vaginitis.

4. Senile vaginitis

Postmenopausal women have declining ovarian function, lower estrogen levels, vaginal wall atrophy, thinning mucosa, increased vaginal pH, reduced local resistance, and other pathogenic bacteria may over-multiply or easily invade and cause inflammation, mainly aerobic bacteria.

5. Vaginitis in young girls

It is caused by poor development of the vulva, low estrogen levels and foreign objects in the vagina of infants and young children, which trigger infection. Common pathogens include Escherichia coli, Staphylococcus aureus, Streptococcus aureus, etc.

10% to 40% of patients have no clinical symptoms. Those with symptoms mainly present with increased vaginal discharge with a fishy odor, which is especially aggravated after sexual intercourse and may be accompanied by mild vulvar itching or burning sensation. Examination showed no signs of congestion or inflammation in the vaginal mucosa. The secretions were grayish white, uniform, thin, and often adhered to the vaginal wall, which could be easily wiped off.

2. Candidal vaginitis

(1) Vulvar itching, burning pain, and pain during sexual intercourse.

(2) Frequent and painful urination. The characteristic of dysuria is that urine irritates the edematous vulva and vestibule during urination, causing pain.

(3) Characteristic secretion: white, thick, and resembling curd or bean curd residue.

(4) Vulvitis presents with geographic erythema, edema, and scratches.

(5) Vaginitis may cause edema, erythema, and white membrane.