Dry cough generally are post viral and continues for longer time...take good anti tussive for suppression

Hi..... Get plenty of sleep and rest your voice. Drink fluids. Drink plenty of water to keep the throat moist and prevent dehydration. Try comforting foods and beverage. Warm liquids — broth, caffeine-free tea or warm water with honey can soothe a sore throat. Gargle saltwater. A saltwater gargle of 1 teaspoon. Gargle the solution and then spit it out.....