What causes deep itching in the legs?

Itch on legs. Dry skin and eczema are probably the most common reasons why legs would itch. Leg swelling and varicose veins. There are a number of itchy rashes that can affect the skin of the legs. I would recommend trying a fragrance-free, dye-free moisturizing cream to see if the condition improves. If it does not, please see your dermatologist for a more definitive diagnosis and treatment.