Female sexual arousal disorder (FSAD) is a disorder characterized by a persistent or recurrent inability to attain sexual arousal or to maintain arousal until the completion of a sexual activity. The diagnosis can also refer to an inadequate lubrication-swelling response normally present during arousal and sexual activity. The condition should be distinguished from a general loss of interest in sexual activity and from other sexual dysfunctions, such as the orgasmic disorder (anorgasmia) and hypoactive sexual desire disorder, which is characterized as a lack or absence of sexual fantasies and desire for sexual activity for some period of time.

Although female sexual dysfunction is currently a contested diagnostic, it has become more common in recent years to use testosterone-based drugs off-label to treat FSAD. It is a subtype of female sexual dysfunction. It occurs in distress due to the inability to attain or maintain adequate vaginal lubrication.