Hypoactive sexual desire disorder (HSDD), is considered as a sexual dysfunction and is characterized as a lack or absence of sexual fantasies and desire for sexual activity for some period of time. For this to be regarded as a disorder, it must cause marked distress or interpersonal difficulties and not be better accounted for by another mental disorder, a drug (legal or illegal), or some other medical condition.
HSDD is listed under the Sexual and Gender Identity Disorders of the DSM-IV. It was first included in the DSM-III under the name Inhibited Sexual Desire Disorder, but the name was changed in the DSM-III-R.
There are various subtypes. HSDD can be general (general lack of sexual desire) or situational (still has sexual desire, but lacks sexual desire for current partner), and it can be acquired (HSDD started after a period of normal sexual functioning) or life-long (the person has always had no/low sexual desire.)