To treat a sore throat after throwing up, start by rinsing your mouth with water to remove any stomach acid. Gargle with warm salt water to soothe irritation and reduce inflammation. Drink plenty of fluids like water, herbal teas, and broths to stay hydrated and keep your throat moist. Avoid acidic, spicy, or hot foods and beverages, which can further irritate your throat. Sucking on throat lozenges or ice chips can provide relief. Honey mixed with warm water or tea can also soothe the throat. Rest and avoid straining your voice. If the soreness persists, consult a healthcare professional.