1. A method for treating a nasal airway in a patient, without forming an incision or leaving behind an implant, the method comprising:advancing a treatment element of a nasal airway treatment device through a nostril of the patient to a nasal valve area of the nasal airway, wherein the treatment element comprises:
a balloon; and
at least one radiofrequency electrode coupled with the balloon;
inflating the balloon to contact nasal mucosa of the nasal airway with the balloon and expand the nasal valve area, without forming an incision;
delivering radiofrequency energy with the at least one radiofrequency electrode to an underlying tissue beneath the nasal mucosa in the nasal valve area, to heat the underlying tissue while maintaining the balloon in an inflated configuration;
deflating the balloon; and
removing the nasal airway treatment device from the nasal airway, without leaving any implant behind in the nasal airway,
wherein expanding the nasal valve area and heating the underlying tissue changes a property of the underlying tissue and causes a diameter of the nasal airway in the nasal valve area to remain at least partially expanded after removal of the nasal airway treatment device and healing of the underlying tissue.