Causes of vaginitis

The common causes of vaginal itching in women are generally related to hygiene habits. If you do not pay attention to personal hygiene, the vulva is very close to the urethra and anus, and it is easy to be irritated and infected by urine and bacteria, leading to the occurrence of vaginitis. Let's take a look at the specific causes of vaginitis.

1. Bacterial vaginosis In normal vagina, lactobacillus that produce hydrogen peroxide is dominant. In bacterial vaginosis, there is an endogenous mixed infection caused by the decrease of lactobacillus in the vagina and the increase of Gardnerella and anaerobic bacteria.

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.