Vulvovaginal Candidiasis: This is a common condition caused by an overgrowth of Candida fungus, leading to itching, redness, and discharge. It's a frequent cause of vaginal itching and can be chronic if not properly treated.

Bacterial Vaginosis (BV): BV is another common condition that can cause vaginal itching, along with an abnormal discharge and odor. It's caused by an imbalance of the natural bacterial flora in the vagina.
Vulvar Lichen Sclerosus: A chronic skin condition that can cause itching, pain, and white patches on the vulva. It's more common in postmenopausal women but can occur at any age.
Atrophic Vaginitis: This condition is caused by a decrease in estrogen levels, leading to thinning and drying of the vaginal walls, which can cause itching, burning, and pain during intercourse. It's common in postmenopausal women.

Vulvar Intraepithelial Neoplasia (VIN) or Vulvar Cancer: Although less common, these conditions can present with persistent itching and should be considered to avoid missing a potentially life-threatening diagnosis. A biopsy is necessary for diagnosis.
Sexually Transmitted Infections (STIs): Certain STIs like trichomoniasis, gonorrhea, and chlamydia can cause vaginal itching. Missing these diagnoses can lead to complications like infertility and increased risk of HIV transmission.
Allergic Contact Dermatitis: An allergic reaction to soaps, douches, condoms, or other products can cause severe itching and should be considered, especially if symptoms worsen with the use of certain products.

Lichen Planus: A rare skin condition that can affect the vulva, causing itching, pain, and white patches.
Psoriasis: Although more commonly associated with skin lesions elsewhere on the body, psoriasis can rarely cause vulvar itching and lesions.
Vulvar Vestibulitis: A condition characterized by chronic pain and itching in the vulvar vestibule, which is the area surrounding the opening of the vagina. The cause is often unknown, and it can be challenging to diagnose and treat.