Itching on the back of the foot, accompanied by a rash, generally consider two conditions: 1, the back of the foot allergies caused by two skin diseases, including eczema and dermatitis. In this case, we can take topical anti-itch medication, such as dinaide ointment or mometasone antacid ointment topical rubbing twice a day for anti-itch treatment, but to avoid scratching. In addition, you should avoid spicy diets and take oral desensitizing medications such as loratadine, cetirizine, paracetamol, and fexofenadine if the itching is severe. 2. Itching of the back of the foot may be due to tinea pedis that is heavy and spreads to the back of the foot, creating an itchy situation. If tinea pedis causes ringworm on the back of the foot because it is caused by fungal infection, it is recommended to use topical antifungal medications such as terbinafine hydrochloride ointment, miconazole nitrate, and copperconazole nitrate ointment for topical antipruritic and antifungal treatment.