A device and method for treating a vagina's anatomic, functional and aesthetic conditions are disclosed. Device comprises a laser energy source which conveys laser energy through an optical fiber handpiece. A cylindrical/penis shaped device/applicator for insertion into the vagina is specially designed for safe and accurate irradiation of determined parts of vaginal mucosa. Applicator has an inner hollow path through which optical fiber is inserted to irradiate inner vaginal tissue. Irradiated mucous tissue contracts, thus vaginal radius is reduced and during penetration in sexual intercourse it embraces penis more tightly. Consequently, sensitivity is substantially improved and sexual intercourse is more pleasurable for both the woman and her partner. In an embodiment, the diode laser source emitting at 1470 nm is used. In another embodiment, vagina's outer dimensions are accurately measured and surgery is performed to achieve dimensions according to certain aesthetic and functional criteria. Present method and device cause minimum pain and risk of side effects. Procedure is ambulatory and can be carried out in a physician's office.