My mother has been having continuous bulgum without cold and coughing. She is having no fever and no other symptoms. But she is coughing this bulgum a lot of times. The mucous or bulgum is white in color. As of now for nose am giving a nasal drop. Am attaching the pic of the nasal drop. Request guide and help as to why my mom is having continuous dry nose with lot of mucous in throat. Thanks and regards.