Atrophic Vaginitis: This condition is very common in postmenopausal women due to the decrease in estrogen levels, leading to thinning and drying of the vaginal walls, which can cause itching and discomfort.

Vaginal Yeast Infections: Although more common in younger women, older females can still develop vaginal yeast infections, especially if they have diabetes, are immunocompromised, or use antibiotics.
Vaginal Eczema/Dermatitis: Allergic reactions or irritant contact dermatitis can cause vaginal itching and are more likely in older women due to decreased skin elasticity and increased susceptibility to allergens.
Lichen Sclerosus: A chronic inflammatory skin condition that can affect the genital area, causing itching, pain, and scarring.

Vaginal Cancer: Although rare, vaginal cancer can present with itching as a symptom. Given the potential severity of this condition, it's crucial not to miss it, especially in older women.
Invasive Infections (e.g., Herpes Simplex): In older adults, especially those who are immunocompromised, herpes simplex virus can cause severe infections that might initially present with itching.
STIs (Sexually Transmitted Infections): Even in older women, STIs like trichomoniasis or gonorrhea can occur and cause vaginal itching.

Lichen Planus: A rare condition that can affect the mucous membranes, including the vagina, causing itching and lesions.
Psoriasis: Although primarily a skin condition, psoriasis can rarely affect the genital area, leading to itching and discomfort.
Vulvar Intraepithelial Neoplasia (VIN): A precancerous condition that can cause itching and should be considered in the differential diagnosis to prevent progression to cancer.