This problem is quite common among teachers and others who speak for long hours every day. It usually happens because the voice box becomes tired and strained from overuse. Most people can recover well with proper care. Try to rest your voice as much as possible and avoid shouting or speaking continuously for long periods. Keep yourself well hydrated by drinking enough water through the day. Warm drinks can also help soothe the throat. Do not keep clearing your throat frequently, as this may worsen irritation. Steam inhalation once or twice daily may help ease discomfort. Stay away from smoke, dust, and exposure to very cold air. If you are teaching, using a microphone can reduce pressure on your voice. If you also have acidity or heartburn, it should be treated as it can affect the throat. If your voice problem does not improve within 2 weeks, it is best to consult an ENT doctor for a thorough examination and voice therapy.