Bulimia nervosa patients may suffer from conjunctival hemorrhages and nose bleeds due to gagging and retching during self-induced vomiting. Furthermore, the acid in vomit may cause damage to the throat, contributing to hoarseness, coughing, dysphagia, and pharyngitis, although these symptoms can usually be treated simply by purging cessation, or through the use of proton pump inhibitors (PPIs). Sialadenosis occurs in over half of those who purge via self-induced vomiting, though it typically goes away on its own with continued cessation of purging behaviors.