Quadriderm RF Cream is used to treat fungal and bacterial skin infections. It treats skin inflammation due to allergies or irritants, eczema (inflamed, itchy, cracked and rough skin patches), psoriasis (skin cells multiply rapidly to form bumpy/uneven red patches covered with white scales), insect bites and stings. Bacterial infection occurs when harmful bacteria grow in the body and cause infection. Fungal infection is caused when a fungus invades and affects the tissue on the skin.