Frostbite redness and swelling can be reduced by general treatment and medication. 1. General treatment: Frostbite patients with red and swollen skin need to pay attention to skin warmth, including wearing more clothes and socks, scarves, gloves, etc., to avoid further cold stimulation of the affected skin. 2. Medication: Frostbite patients can follow the doctor’s instructions to use vitamin E ointment, frostbite ointment and other drugs, which can help to improve the situation of frostbite, help reduce swelling, anti-inflammatory. Patients can also take oral niacinamide, nifedipine and other vasodilator drugs, which can improve blood circulation and promote hematoma subside. There are more ways to reduce the swelling of frostbite erythema, so patients are advised to go to regular hospitals and cooperate with doctors for standardized treatment.