Intertrigo: This is a common condition in elderly men, especially in areas where skin folds create a warm, moist environment. It's caused by friction and fungal or bacterial infection, leading to redness, itching, and sometimes a foul odor. The scrotal area, being a skin fold, is prone to such conditions, especially in older adults who may have reduced mobility or hygiene challenges.

Eczema/Dermatitis: Atopic dermatitis or contact dermatitis can cause redness and irritation in the scrotal area. This could be due to allergic reactions, irritants, or even systemic conditions.
Fungal Infections (e.g., Candidiasis): Warm, moist areas like the scrotum are susceptible to fungal infections, which can cause redness, itching, and sometimes a white discharge.
Bacterial Infections: Similar to fungal infections, bacterial infections can thrive in warm, moist environments and cause symptoms like redness, swelling, and discharge.

Squamous Cell Carcinoma or Other Skin Cancers: Although less common, skin cancers can present with redness and lesions in unusual areas, including the scrotum. Given the patient's age, it's crucial not to miss a potentially malignant condition.
Necrotizing Fasciitis: A severe bacterial infection that can cause rapid progression of redness, swelling, and pain. It's rare but life-threatening and requires immediate medical attention.
Genital Herpes: Caused by the herpes simplex virus, this condition can lead to painful blisters or sores in the genital area, including the scrotum.

Erythrasma: A bacterial infection that thrives in warm, moist areas and can cause redness and brownish patches, typically in the groin area.
Lichen Sclerosus: A rare condition that creates patchy, white skin that's thinner than normal. It can cause itching, pain, and bleeding, especially if the skin tears.
Zoon's Balanitis: A rare condition characterized by reddish, well-demarcated plaques on the glans penis or, less commonly, other parts of the genitalia, including the scrotum.