A cold is one of the most common causes of a dry throat and coughing, usually because of nasal congestion that leads to post nasal drip. This will then lead to irritation of the throat, which often feels like a "tickle" in the throat causing a persistent cough for as long as the nasal congestion lasts. Sometimes, dry air, allergies, or simply not staying hydrated enough throughout the day can also cause dry throat and coughing. Productive coughs, which may be caused by a chest cold, are not usually accompanied by a dry throat, and typically occur at the end of a cold when the congestion has moved to the chest.
If the dry throat and coughing is caused by nasal congestion and post nasal drip due to a cold, one of the best ways to treat it is with cold medicine that helps relieve congestion. In addition, be sure to blow the nose rather than sniffling all day, which can make the dry throat and coughing worse, and can also lead to sinus infections which will generally require antibiotics for treatment. As with any cold, it is important to drink plenty of fluids to stay hydrated, which can also help to hydrate the throat. Cough drops may be able to help in a pinch as well.
Dry air in the home or workplace, and especially when sleeping at night, is another one of the most common causes for dry throat and coughing. Air conditioning or forced air heat can both lead to dryness and irritation in the throat. This may be helped by drinking hot herbal tea with lemon and honey, or by sleeping with a humidifier on at night or even throughout the day if necessary to better hydrate the air. Standing over a steaming pot of hot water, or taking a hot shower, may also help to moisten the nose and throat, and relieve coughing.
Seasonal or pet allergies can also lead to a dry throat and coughing. Trying to eliminate the source of the allergies as much as possible, such as installing an air purifier, might be helpful. Allergy medications might be helpful, though some people find that these medications make the throat feel even more dry. Once again, staying hydrated is one of the best ways to prevent coughing accompanied by a scratchy throat, as well as to relieve the pain from a sore throat, and to heal more quickly from a cold.
