Sudden Severe Lower Abdominal Pain

Sudden severe lower abdominal pain - particularly when it prevents normal movement, causes collapse, or is the worst pain the patient has experienced - is always a surgical emergency. The most important causes are: perforated appendicitis, ruptured ectopic pregnancy (in women), ovarian torsion, and colonic perforation. All require immediate hospital evaluation. Time is critical.

Quick Answers

Is sudden severe lower pain always an emergency? Yes - always needs evaluation. The severity and sudden onset suggest a serious process: perforation, torsion, rupture, or advanced appendicitis.

Most important causes? Perforated appendicitis, ruptured ectopic pregnancy, ovarian torsion, perforated Meckel's diverticulum, and occasionally perforated peptic ulcer with referred lower pain.

Critical question for women? Any possibility of pregnancy? A missed period + sudden severe lower pain = ectopic pregnancy until proven otherwise by blood beta-hCG. This is a life-threatening emergency.

What to do? Go to hospital immediately. Do not take painkillers and wait. IV access, blood tests, pregnancy test, CT scan or ultrasound are needed urgently.

For Women: Blood beta-hCG Test Must Be Performed First

Any woman of reproductive age with sudden severe lower abdominal pain must have a blood pregnancy test (beta-hCG) performed immediately - before other investigations. A positive result in the context of severe lower pain means ectopic pregnancy until proven otherwise. Ruptured ectopic pregnancy causes haemorrhage and can be fatal within hours. This test must not be omitted or delayed.

Causes of Sudden Severe Lower Abdominal Pain

Appendicitis (Advanced)

Usually preceded by progressive pain over hours
Sudden worsening = perforation occurring
Brief "false improvement" then generalised pain
Rigid abdomen
Emergency laparoscopic surgery

Ectopic Pregnancy (Women)

Sudden, severe, may radiate to shoulder
Missed period + positive pregnancy test
Internal haemorrhage
Collapse, pallor, low BP
EMERGENCY - laparoscopic salpingectomy

Ovarian Torsion (Women)

Sudden onset, severe, right or left lower
Ovary twists on its blood supply
Ischaemia develops rapidly (hours)
Ultrasound may show cyst; Doppler reduced flow
Emergency laparoscopic detorsion

Other Causes

Perforated Meckel's diverticulum
Sigmoid volvulus (left lower)
Strangulated inguinal hernia
Perforated colonic diverticulum
Testicular torsion (young men) - scrotal, lower abdomen

Go to hospital immediately if sudden severe lower pain is accompanied by:

Collapse or feeling faint - haemorrhage (ectopic rupture)
Missed period in a woman - ectopic pregnancy until proven otherwise
Rigid abdomen - peritonitis from perforation
Pain spreading from right/left lower to whole abdomen
Scrotal pain in young men with lower abdominal pain - testicular torsion
Unable to walk or stand upright

Frequently Asked Questions

An ectopic pregnancy occurs when a fertilised egg implants outside the uterus - most commonly in the fallopian tube. The growing pregnancy cannot be sustained in the tube and eventually causes it to rupture, releasing blood into the abdominal cavity. Rupture causes sudden severe lower abdominal pain, shoulder tip pain (from diaphragmatic irritation by blood), and haemorrhage - rapid blood loss leads to collapse and can be fatal without emergency surgery. Any woman of reproductive age with sudden lower abdominal pain and a missed period must have a blood pregnancy test immediately.

Ovarian torsion occurs when the ovary (often with an attached cyst) twists on its supporting ligaments, cutting off its own blood supply. It causes sudden, severe, one-sided lower abdominal pain - often accompanied by nausea. The pain may be intermittent initially as the ovary twists and untwists. If untreated, the ovary undergoes irreversible ischaemic damage within hours. Emergency laparoscopic surgery (detorsion - untwisting the ovary) saves the ovary if performed promptly. The ovary cannot be saved after necrosis. Time is critical for fertility preservation.

Desi Patient Questions

Mane stri chhu - period miss thayo ane achanak bahu lower dard thayo - hospital java joiye?

Ha - turant javo. Missed period + sudden severe lower pain = ectopic pregnancy EMERGENCY. Blood beta-hCG test first thing. Ectopic rupture = haemorrhage ane death within hours if untreated. Please - do not delay. Ambulance bulavo jyaré zaruri hoy.

Think It Might Be Appendicitis? Don't Wait.

CT scan + same-day laparoscopic appendectomy if confirmed. Emergency evaluation available 24 hours at Sterling Hospital.

? Emergency Call WhatsApp Now

Symptom Pages: Right Lower Abdominal Pain | Sudden Abdominal Pain | Abdominal Pain with Fever

Disease Pages: Appendicitis | Complicated Appendicitis | Acute Surgical Abdomen

Treatment Pages: Laparoscopic Appendectomy

Article Reviewed by: Dr. Samir Contractor, Senior Consultant Laparoscopic, Anorectal & Bariatric Surgeon, MS, FRCS(UK), FMAS, FACS(USA), PN Certified exercise and Nutrition Coach (Canada)

Clinical expertise: Anorectal surgery, advanced laparoscopy, bariatric & metabolic surgery. Medically Supervised Weight loss program

Experience: 25+ years of Clinical experience.

Last medically reviewed: April 2026

Editorial policy: Content on drsamircontractor.com is written and reviewed by a practising surgeon. Each page is updated whenever clinical practice guidelines change.

Medical Disclaimer: This page is for educational purposes only and does not replace a face-to-face consultation with a qualified medical professional. The information provided is based on general clinical principles and may not apply to every individual case. Do not self-diagnose or self-treat based on this content. Dr. Samir Contractor and Sterling Hospital, Vadodara, are not responsible for decisions made based solely on this information.

Sudden Severe Lower Abdominal Pain | Emergency Causes