You can take a look at the following things you can do to treat dry cough or sore throat. However, you need to visit a doctor immediately if it persists for more than 2 days. > Add Mint leaves or Caraway seeds (Ajwain) to hot water and inhale the steam. This can be done once a day.> Add powdered clove to honey or jaggery and consume this mixture in small quantities 2 to 3 times a day.