Dry Skin (Xerosis): This is a common condition, especially in older adults and those with diabetes, due to decreased moisture in the skin. Itching, particularly on the legs, is a hallmark symptom.

Diabetic Dermopathy: A skin condition associated with diabetes, characterized by light brown or reddish-brown patches, often on the legs, which can be itchy.
Stasis Dermatitis: Caused by poor circulation, leading to fluid buildup in the legs, which can result in itching, redness, and skin thickening.
Eczema (Atopic Dermatitis): Although more common in children, eczema can occur at any age and may cause itching on various parts of the body, including the legs.
Contact Dermatitis: An allergic reaction or irritation from substances like soaps, detergents, or metals, which can cause itching, especially if the individual has been exposed to new products or environments.

Deep Vein Thrombosis (DVT): While DVT typically presents with swelling, redness, and warmth of the affected limb, itching can occasionally be a symptom, especially if there's associated skin irritation or dermatitis.
Peripheral Artery Disease (PAD): Reduced blood flow to the legs can cause a variety of symptoms, including itching due to poor skin perfusion.
Malignancy (e.g., Lymphoma): Rarely, itching can be a presenting symptom of an underlying malignancy, which would be critical to diagnose early.

Notalgia Paresthetica: A condition characterized by itching on the back, but can occasionally affect other areas, due to nerve compression or other neurological factors.
Brachioradial Pruritus: Typically affects the arms but can rarely cause itching on the legs, often related to nerve issues or exposure to sunlight.
Aquagenic Pruritus: Itching that occurs after contact with water, without any visible skin lesions, which is rare and can be challenging to diagnose.