Dry cough for several months can be due to a variety of reasons, common such as allergic cough, chronic pharyngitis, etc., according to the cause of the disease should be taken to take general measures, medication and other ways to improve. 1. Allergic cough: If the allergic cough is caused by long-term contact with allergens, you should get rid of the allergens, avoid contact with pollen, animal dander and other easily sensitized substances, and if it is serious, you can use loratadine, cetirizine and other drugs under the guidance of a doctor. 2. Chronic pharyngitis: Dry cough for several months may also be related to chronic pharyngitis. You can use compound borax solution, furacilin solution gargle, or take iodine tablets, watermelon cream tablets, etc. to ease the discomfort and reduce the production of dry cough. Dry cough for several months is not good for more reasons, such as cough variant asthma, Mycoplasma pneumoniae pneumonia, gastroesophageal reflux, eosinophilic bronchitis, adverse drug reactions, etc., if the symptom fails to get better or even gradually aggravate, you need to consult a regular hospital in a timely manner, and cooperate with the doctor to improve the examination, standardized treatment.