Possible causes are:
1- Vaginal candidiasis: caused by a fungus called Candida. Not a sexually transmitted infection (STI). Causes severe itching (sometimes you itch so hard you injure yourself and bleed a bit), burning, and cotton wool whitish secretions.
Can be treated with itraconazole or fluconazole (topical cream plus oral tablets).
2-Bacterial vaginosis: can be due to more than one type of bacteria. This is Not an STI but is more likely with sexual intercourse. The infection has a propensity to progress upward and result in pelvic inflammatory disease (PID), which is the inflammation of the uterus and ovaries; it's characterized by the following signs and symptoms:
-Dull pain or tenderness in the stomach or lower abdominal section, or pain in the right upper abdomen.
-Abnormal vaginal discharge that is yellowish or greenish in color and that smells funny (abnormal)
-Pain upon urination ( Dysuria)
-Chills or high fever.
-Nausea and vomiting.
-Pain during sex (dyspanreunia)
Bacterial vaginosis also causes itchiness, burning, and a fish-like smelling secretions.
Culture of those is needed to identify the causing agent &give the right treatment.
3-STI: three very common infections are:
- Trichomoniasis: produces green frothy foul smelling secretions and causes pain during intercourse,
-Chlamydia infection: common in women with multiple sexual partners and is characterized by some vaginal bleeding that is worse with intercourse.
-Neisseria gonorrhea: the most common presenting symptom of gonorrhea is vaginal discharge that is usually described as thin, thick (looks like pus), and mildly odorous; however, many patients have minimal or no symptoms; dysuria; Intermenstrual bleeding; dyspareunia (painful intercourse); mild pain in the lower abdomen.
Diagnosis of these infections is made based on vaginal exam and culture of vaginal swab/secretions, plus a urine analysis and culture to rule out associated urinary tract infection.
Treatment of these infections is with the appropriate antimicrobial agents for both the patient and the sexual partner(s).