Tinea cruris (Jock itch): This is a common fungal infection in the groin area, especially in older adults, causing intense itching and a rash. The warm, moist environment of the groin makes it an ideal place for fungal growth.

Eczema/Dermatitis: Atopic dermatitis or contact dermatitis can cause genital pruritus due to allergic reactions or skin irritation.
Psoriasis: Although less common in the genital area, psoriasis can cause itching and skin lesions.
Lichen sclerosis: A condition that creates patchy, white skin that's thinner than normal, often causing itching and discomfort.
Urethritis or prostatitis: Infections of the urethra or prostate can cause itching, burning, and discomfort in the genital area.

Squamous cell carcinoma or other genital cancers: Although rare, these conditions can present with itching and skin changes. Early detection is crucial for effective treatment.
Diabetes mellitus: Uncontrolled diabetes can lead to genital itching due to yeast infections or poor circulation.
Lymphoma or leukemia: Certain types of cancer can cause itching all over the body, including the genital area.
Neurological disorders (e.g., multiple sclerosis, neuropathy): These conditions can cause itching sensations due to nerve damage.

Scabies: A parasitic infection caused by the scabies mite, leading to severe itching, especially at night.
Keratosis pilaris: A condition characterized by rough, dry skin, which can sometimes cause itching.
Zinc deficiency: A nutritional deficiency that can cause skin lesions and itching.
Contact dermatitis due to specific allergens: Such as latex, certain soaps, or dyes in clothing.