Sexual dysfunction can be classified into four categories:
sexual desire disorders,
arousal disorders,
orgasm disorders, and
pain disorders. Dysfunction among men and women are studied in the fields of
andrology and
gynecology respectively.
Sexual desire disorders Sexual desire disorders or decreased
libido are characterized by a lack of
sexual desire,
libido for
sexual activity, or
sexual fantasies for some time. The condition ranges from a general lack of sexual desire to a lack of sexual desire for the current partner. The condition may start after a period of normal sexual functioning, or the person may always have had an absence or a lesser intensity of sexual desire. The causes vary considerably but include a decrease in the production of normal
estrogen in women, or
testosterone in both men and women. Other causes may be aging, fatigue, pregnancy, medications (such as
SSRIs), or psychiatric conditions, such as
depression and
anxiety. While many causes of low sexual desire are cited, only a few of these have ever been the object of empirical research.
Sexual arousal disorders Sexual arousal disorders were previously known as
frigidity in women and
impotence in men, though these have now been replaced with less judgmental terms. Impotence is now known as
erectile dysfunction, and frigidity has been replaced with a number of terms describing specific problems that can be broken down into four categories as described by the
American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders: lack of desire, lack of arousal, pain during intercourse, and lack of orgasm. For both men and women, these conditions can manifest themselves as an aversion to and avoidance of sexual contact with a partner. In men, there may be partial or complete failure to attain or maintain an erection, or a lack of sexual excitement and pleasure in sexual activity. There may be physiological origins to these disorders, such as decreased blood flow or lack of vaginal lubrication. Chronic disease and the partners' relationship can also contribute to dysfunction. Additionally,
postorgasmic illness syndrome (POIS) may cause symptoms when aroused, including adrenergic-type presentation: rapid breathing,
paresthesia, palpitations, headaches,
aphasia, nausea, itchy eyes, fever, muscle pain and weakness, and fatigue. From the onset of arousal, symptoms can persist for up to a week in patients. The cause of this condition is unknown; however, it is believed to be a pathology of either the immune system or autonomic nervous systems. It is defined as a rare disease by the
National Institute of Health, but the prevalence is unknown. It is not thought to be psychiatric in nature, but it may present as anxiety relating to coital activities and may be incorrectly diagnosed as such. There is no known cure or treatment.
Erectile dysfunction Erectile dysfunction (ED), or impotence, is a sexual dysfunction characterized by the inability to develop or maintain an erection of the
penis. There are various underlying causes of ED, including damage to anatomical structures, psychological causes, medical disease, and drug use. Many of these causes are medically treatable. Psychogenic ED is defined as ED primarily due to psychological disease or interpersonal factors. Chronic psychological Psychogenic erectile dysfunction (ED) is characterized by difficulty achieving or maintaining an erection primarily due to psychological or interpersonal factors. Factors such as performance anxiety, relationship distress, or ongoing stress can initially lead to temporary erectile difficulties. If these psychological factors persist over time, they may contribute to physiological changes in vascular and neural pathways, potentially resulting in chronic erectile dysfunction. Psychogenic ED is also strongly associated with depression or low mood, and addressing the underlying psychological or mental health conditions is recommended for effective management. Medical conditions are also common causes of erectile dysfunction. Diseases such as
cardiovascular disease,
multiple sclerosis,
kidney failure,
vascular disease, and
spinal cord injury can cause erectile dysfunction. It is estimated that around 30 million men in the United States and 152 million men worldwide have erectile dysfunction. However,
social stigma,
low health literacy, and social
taboos lead to under reporting which makes an accurate prevalence rate hard to determine. ED from
vascular disease is seen in individuals who have
atherosclerosis. Vascular disease is common in individuals who smoke or have
diabetes,
peripheral vascular disease, or
hypertension. Cardiovascular disease can decrease blood flow to penile tissues, making it difficult to develop or maintain an erection. Drugs are also a cause of erectile dysfunction. Individuals who take drugs that lower
blood pressure,
antipsychotics,
antidepressants, sedatives, narcotics, antacids, or alcohol can have problems with
sexual function and loss of libido.
Hormone deficiency is a relatively rare cause of erectile dysfunction. In individuals with testicular failure, as in
Klinefelter syndrome, or those who have had
radiation therapy,
chemotherapy, or childhood exposure to the
mumps virus, the testes may fail to produce testosterone. Other hormonal causes of erectile failure include brain tumors,
hyperthyroidism,
hypothyroidism, or
adrenal gland disorders.
Orgasm disorders Anorgasmia Anorgasmia is classified as persistent delays or absence of orgasm following a normal sexual excitement phase in at least 75% of sexual encounters. The disorder can have physical, psychological, or pharmacological origins.
SSRI antidepressants are a common pharmaceutical culprit, as they can delay orgasm or eliminate it entirely. A common physiological cause of anorgasmia is
menopause; one in three women report problems obtaining an orgasm during sexual stimulation following menopause.
Premature ejaculation Premature ejaculation is when ejaculation occurs before the partner achieves orgasm, or a mutually satisfactory length of time has passed during intercourse. There is no correct length of time for intercourse to last, but generally, premature ejaculation is thought to occur when ejaculation occurs in under two minutes from the time of the insertion of the penis. For a diagnosis, the patient must have a chronic history of premature ejaculation, poor ejaculatory control, and the problem must cause feelings of dissatisfaction as well as distress for the patient, the partner, or both. Premature ejaculation has historically been attributed to psychological causes, but newer theories suggest that premature ejaculation may have an underlying neurobiological cause that may lead to rapid ejaculation.
Post-orgasmic disorders Post-orgasmic disorders cause symptoms shortly after
orgasm or
ejaculation.
Post-coital tristesse (PCT) is a feeling of
melancholy and
anxiety after sexual intercourse that lasts for up to two hours.
Sexual headaches occur in the skull and neck during sexual activity, including
masturbation, arousal or orgasm. In men,
post orgasmic illness syndrome (POIS) causes severe
muscle pain throughout the body and other symptoms immediately following
ejaculation. These symptoms last for up to a week. Some doctors speculate that the frequency of POIS "in the population may be greater than has been reported in the academic literature", and that many with POIS are undiagnosed. POIS may involve adrenergic symptoms: rapid breathing,
paresthesia,
palpitations,
headaches,
aphasia,
nausea, itchy eyes,
fever,
muscle pain and
weakness, and
fatigue. The etiology of this condition is unknown; however, it is believed to be a pathology of either the immune system or autonomic nervous systems. It is defined as a rare disease by the NIH, but the prevalence is unknown. It is not thought to be psychiatric in nature, but it may present as anxiety relating to coital activities and thus may be incorrectly diagnosed as such. There is no known cure or treatment. Peyronie's disease has no certain cause, but the leading hypothesis is that it arises from dysregulated
wound healing in response to
chronic microtrauma of the erect penis. Risk factors include age, genetics, minor trauma (potentially during
cystoscopy or
transurethral resection of the prostate), chronic systemic vascular diseases,
diabetes, smoking, and alcohol consumption. == Causes ==