There are many causes of dry throat and bitter mouth, generally considered to be caused by chronic pharyngitis, mainly through the drug anti-infection treatment, chemical treatment and so on. 1. Anti-infective treatment: available compound borax solution, 2% of the boric acid solution gargle, can play antibacterial anti-inflammatory, deodorant and other effects, in the gargle should be spit out immediately after, prohibit swallowing. You can also apply some compound iodized glycerin in the throat to reduce the inflammation of the pharynx. 2. Chemical treatment: If chronic pharyngitis is not treated properly, the seriousness of the condition will lead to pharyngeal mucosal congestion, lymphoid follicular hyperplasia. Chronic hypertrophic pharyngitis can be treated by cauterizing the enlarged area with 20% silver nitrate solution or chromic acid solution. Medication varies greatly from individual to individual, so the appropriate medication should be chosen under the guidance of a physician. Dry throat and bitter mouth may also be caused by other diseases, you should go to the hospital in time to find out the cause, targeted treatment.