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Pelvic Pain

By David H. Barad, MD, MS, Albert Einstein College of Medicine, Bronx;Center for Human Reproduction

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Pelvic pain is discomfort in the lower torso; it is a common complaint in women. It is considered separately from perineal pain, which occurs in the external genitals and nearby perineal skin.

Etiology

Pelvic pain may originate in reproductive organs (cervix, uterus, uterine adnexa) or other organs. Sometimes the cause is unknown.

Gynecologic disorders

Some gynecologic disorders (see Table: Some Gynecologic Causes of Pelvic Pain) cause cyclic pain (ie, pain recurring during the same phase of the menstrual cycle). In others, pain is a discrete event unrelated to menstrual cycles. Whether onset of pain is sudden or gradual helps discriminate between the two.

Overall, the most common gynecologic causes of pelvic pain include

Uterine fibroids can cause pelvic pain if they are degenerating or if their located in the uterus results in excessive bleeding or cramping. Most uterine fibroids do not cause pain.

Some Gynecologic Causes of Pelvic Pain

Cause

Suggestive Findings

Diagnostic Approach*

Related to menstrual cycle

Sharp or crampy pain a few days before or at onset of menses, often with headache, nausea, constipation, diarrhea, or urinary frequency

Symptoms usually peaking in 24 h but sometimes persisting for 2–3 days after onset of menses

Clinical evaluation

Sharp or crampy pain before and during early menses, often with dysmenorrhea, dyspareunia, or painful defecation

May eventually cause pain unrelated to the menstrual cycle

In advanced stages, sometimes uterine retroversion, tenderness, decreased mobility

Sometimes a fixed pelvic mass (possibly an endometrioma) or tender nodules noted during bimanual vaginal and rectovaginal examination

Clinical evaluation

Laparoscopy

Mittelschmerz

Sudden onset of severe, sharp pain, most intense at onset and abating over 1–2 days

Often accompanied by light spotty vaginal bleeding

Occurring midcycle (during ovulation), caused by mild, brief peritoneal irritation due to a ruptured follicular cyst

Clinical evaluation

Diagnosis of exclusion

Unrelated to menstrual cycle

Gradual onset of pelvic pain, mucopurulent cervical discharge

Sometimes fever, dysuria, dyspareunia

Typically, marked cervical motion tenderness and adnexal tenderness

Rarely, an adnexal mass (eg, abscess)

Clinical evaluation

Cervical culture

Sometimes pelvic ultrasonography (if abscess is suspected)

Ruptured ovarian cyst

Sudden onset of pain, most severe at onset and often rapidly decreasing over a few hours

Sometimes with slight vaginal bleeding, nausea, vomiting, and peritoneal signs

Clinical evaluation

Sometimes pelvic ultrasonography

Sudden onset of localized, constant (not crampy) pain, often with vaginal bleeding and sometimes syncope or hemorrhagic shock

Closed cervical os

Sometimes acute abdominal distention or tender adnexal mass

Quantitative beta-hCG measurement

Pelvic ultrasonography

Sometimes laparoscopy or laparotomy

Acute degeneration of uterine fibroid

Sudden onset of pain, vaginal bleeding

Most common during the first 12 wk of pregnancy or after delivery or termination of a pregnancy

Pelvic ultrasonography

Sudden onset of severe, unilateral pain, occasionally colicky (because of intermittent torsion)

Often with nausea, vomiting, peritoneal signs, and cervical motion tenderness

Presence of risk factors (eg, pregnancy, induction of ovulation, ovarian enlargement to > 4 cm)

Pelvic ultrasonography with color Doppler flow studies

Sometimes laparoscopy or laparotomy

Gradual onset of pain, vaginal discharge (which precedes bleeding), abnormal vaginal bleeding (eg, postmenopausal bleeding, premenopausal recurrent metrorrhagia)

Rarely, a palpable pelvic mass

Pelvic ultrasonography

Biopsy

Sometimes additional tests such as hysteroscopy or saline-infusion sonohysterography to help identify abnormalities in the endometrium

Adhesions

Gradual onset of pelvic pain (often becoming chronic) or dyspareunia in patients who have had abdominal surgery or sometimes pelvic infections

No vaginal bleeding or discharge

Sometimes nausea and vomiting (suggesting intestinal obstruction)

Clinical evaluation

Diagnosis of exclusion

Sometimes abdominal obstruction series (flat and upright abdominal x-rays)

Vaginal bleeding associated with crampy lower abdominal pain or back pain during early pregnancy and accompanied by other symptoms of early pregnancy, such as breast tenderness, nausea, and delayed menses

Clinical evaluation

Pregnancy test

Pelvic ultrasonography to assess viability of pregnancy

*Pelvic examination, urinalysis, and a urine or serum pregnancy test should be done. Most patients with acute or significant recurrent symptoms require pelvic ultrasonography.

Beta-hCG = beta subunit of human chorionic gonadotropin.

Nongynecologic disorders

Nongynecologic disorders that can cause pelvic pain may be

  • GI (eg, tumors, constipation, high perirectal abscess)

  • Urinary (eg, cystitis, interstitial cystitis, calculi)

  • Musculoskeletal (eg, diastasis of the pubic symphysis due to previous vaginal deliveries, abdominal muscle strains)

  • Psychogenic (eg, somatization; effects of previous physical, psychologic, or sexual abuse)

The most common is difficult to specify.

Evaluation

Evaluation of pelvic pain must be expeditious because some causes of pelvic pain (eg, ectopic pregnancy, adnexal torsion) require immediate treatment.

Pregnancy should be excluded in women of childbearing age regardless of stated history.

History

History of present illness should include gynecologic history (gravity, parity, menstrual history, history of sexually transmitted disease) and onset, duration, location, and character of pain. Quality, acuity, severity, and location of pain and its relationship to the menstrual cycle are noted and can suggest the most likely causes. Important associated symptoms include vaginal bleeding or discharge and symptoms of hemodynamic instability (eg, dizziness, light-headedness, syncope or near-syncope).

Review of systems should seek symptoms suggesting possible causes, including the following:

  • Morning sickness, breast swelling or tenderness, or missed menses: Pregnancy

  • Fever and chills: Infection

  • Abdominal pain, nausea, vomiting, or change in stool habits: GI disorders

  • Urinary frequency, urgency, or dysuria: Urinary disorders

Past medical history should note history of infertility, ectopic pregnancy, pelvic inflammatory disease, urolithiasis, diverticulitis, and any GI or GU cancers. Any previous abdominal or pelvic surgery should be noted.

Physical examination

The physical examination begins with review of vital signs for signs of instability (eg, fever, hypotension) and focuses on abdominal and pelvic examinations.

The abdomen is palpated for tenderness, masses, and peritoneal signs. Rectal examination is done to check for tenderness, masses, and occult blood. Location of pain and any associated findings may provide clues to the cause (see Table: Some Clues to Diagnosis of Pelvic Pain).

Pelvic examination includes inspection of external genitals, speculum examination, and bimanual examination. The cervix is inspected for discharge, uterine prolapse, and cervical stenosis or lesions. Bimanual examination should assess cervical motion tenderness, adnexal masses or tenderness, and uterine enlargement or tenderness.

Red flags

The following findings are of particular concern:

  • Syncope or hemorrhagic shock (eg, tachycardia, hypotension)

  • Peritoneal signs (rebound, rigidity, guarding)

  • Postmenopausal vaginal bleeding

  • Fever or chills

  • Sudden severe pain with nausea, vomiting, diaphoresis, or agitation

Interpretation of findings

Acuity and severity of pelvic pain and its relationship to menstrual cycles can suggest the most likely causes (see Table: Some Gynecologic Causes of Pelvic Pain). Quality and location of pain and associated findings also provide clues (see Table: Some Clues to Diagnosis of Pelvic Pain). However, findings can be nonspecific. For example, endometriosis can result in a wide variety of findings.

Some Clues to Diagnosis of Pelvic Pain

Finding

Possible Diagnosis

Syncope or hemorrhagic shock

Possibly a ruptured ovarian cyst

Vaginal discharge, fever, bilateral pain and tenderness

Severe, intermittent colicky pain (sometimes with nausea), which may develop and reach peak intensity within seconds or minutes

Renal colic

Ectopic pregnancy

Nausea followed by anorexia, fever, and right-sided pain

Constipation, diarrhea, relief or worsening of pain during defecation

GI disorder

Left lower quadrant pain in women > 40

Generalized abdominal tenderness or peritoneal signs

Peritonitis (eg, due to appendicitis, diverticulitis, another GI disorder, pelvic inflammatory disease, adnexal torsion, or rupture of an ovarian cyst or ectopic pregnancy)

Tenderness in the anterior vaginal wall

Lower urinary tract disorder (eg, interstitial cystitis), causing bladder or urethral pain

Uterine fixation detected by bimanual examination

Adhesions

Late-stage cancer

Tender adnexal mass or tenderness with cervical motion

Ectopic pregnancy

Pelvic inflammatory disease

Ovarian cyst or tumor

Adnexal torsion

Tenderness of the pubic bone in parous women, particularly if pain occurs during ambulation

Diastasis of the pubic symphysis

Acute, painful defecation plus localized, tender, fluctuant mass felt during internal or external rectal examination; with or without fever

Perirectal abscess

Gross or microscopic rectal blood

GI disorder

Chronic painful defecation plus localized, firm woody mass felt during internal or external rectal examination; without fever

Severe endometriosis

Late-stage cervical cancer

Testing

All patients with pelvic pain should have

  • Urinalysis

  • Urine pregnancy test

If a patient is pregnant, ectopic pregnancy is assumed until excluded by ultrasonography or, if ultrasonography is unclear, by other tests (see Pelvic Pain During Early Pregnancy). If a suspected pregnancy may be < 5 wk, a serum pregnancy test should be done; a urine pregnancy test may not be sensitive enough to rule out pregnancy that early in gestation.

Other testing depends on which disorders are clinically suspected. If a patient cannot be adequately examined (eg, because of pain or inability to cooperate) or if a mass is suspected, pelvic ultrasonography is done. If the cause of severe or persistent pain remains unidentified, laparoscopy is done.

Pelvic ultrasonography using a vaginal probe can be a useful adjunct to pelvic examination; it can better define a mass or help diagnose a pregnancy after 5 wk gestation (ie, 1 wk after a missed menstrual period). For example, free pelvic fluid and a positive pregnancy test plus no evidence of an intrauterine pregnancy help confirm ectopic pregnancy.

Treatment

The underlying disorder is treated when possible.

Pelvic pain is initially treated with oral NSAIDs. Patients who do not respond well to one NSAID may respond to another.

If NSAIDs are ineffective, other analgesics or hypnosis may be tried.

Musculoskeletal pain may also require rest, heat, physical therapy, or, for fibromyalgia, injection of tender points with 0.5% bupivacaine or 1% lidocaine.

If patients have intractable pain, hysterectomy can be done, but it may be ineffective.

Geriatrics Essentials

Pelvic pain symptoms in elderly women may be vague. Careful review of systems with attention to bowel and bladder function is essential.

In elderly women, common causes of pelvic pain may be different because some disorders that cause pelvic pain become more common as women age, particularly after menopause. These disorders include

A sexual history should be obtained; clinicians often do not realize that many women remain sexually active throughout their life. Whether a woman’s partner is living should be determined before inquiring about sexual activity. In elderly women, vaginal irritation, itching, urinary symptoms, or bleeding may occur secondary to sexual intercourse. Such problems often resolve after a few days of pelvic rest.

Acute loss of appetite, weight loss, dyspepsia, or a sudden change in bowel habits may be signs of ovarian or uterine cancer and requires thorough clinical evaluation.

Key Points

  • Pelvic pain is common and may have a gynecologic or nongynecologic cause.

  • Pregnancy should be ruled out in women of childbearing age.

  • Quality, acuity, severity, and location of pain and its relationship to the menstrual cycle can suggest the most likely causes.

  • Dysmenorrhea is a common cause of pelvic pain but is a diagnosis of exclusion.

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* This is the Professional Version. *