1. Diverticulitis

One of the most common causes of pain in lower left abdomen, especially in adults over 40, is diverticulitis.

Diverticula are small pouches that can form in the colon. When these pouches become inflamed or infected, it causes diverticulitis.

Symptoms may include:

• Steady lower left abdominal pain
• Fever
• Nausea or vomiting
• Constipation (sometimes diarrhea)
• Bloating

Treatment:

• Mild cases: antibiotics, clear liquid diet, rest
• Severe cases: hospitalization, IV antibiotics
• Rarely: surgery for complications

Diverticulitis can become serious if untreated, so persistent pain with fever should prompt a doctor visit.

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2. Constipation and Gas

Constipation is one of the most overlooked causes of pain in lower left abdomen.

When stool builds up in the colon, it stretches the bowel and causes cramping or aching discomfort.

Signs include:

• Fewer than three bowel movements per week
• Hard or difficult-to-pass stools
• Bloating
• Relief after a bowel movement

Solutions:

• Increase fiber gradually
• Drink more water
• Regular physical activity
• Over-the-counter stool softeners (if needed)

This type of pain is usually mild to moderate and improves with bowel movement.

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3. Irritable Bowel Syndrome (IBS)

IBS is a functional bowel disorder that commonly causes recurring abdominal pain.

Typical symptoms:

• Cramping pain in lower abdomen
• Alternating constipation and diarrhea
• Bloating
• Mucus in stool

Pain from IBS often improves after bowel movements.

Management:

• Stress reduction
• Diet changes (such as low FODMAP diet)
• Fiber supplements
• Prescription medications in some cases

IBS does not damage the intestines, but it can significantly affect quality of life.

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4. Kidney Stones

Although kidney pain often starts in the back, it can radiate to the lower abdomen.

Symptoms:

• Sharp, severe pain that comes in waves
• Pain spreading to groin
• Nausea
• Blood in urine
• Urgent need to urinate

Kidney stone pain is usually intense and difficult to ignore. Medical evaluation is important.

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5. Ovarian Causes (Women Only)

In women, pain in lower left abdomen may be related to the left ovary.

Possible causes include:

• Ovarian cysts – Often mild, may resolve on their own
• Ovulation pain (mittelschmerz) – Brief mid-cycle pain
• Ovarian torsion – Twisting of the ovary (medical emergency)
• Endometriosis – Chronic pelvic pain, painful periods

Seek urgent care if pain is:

• Sudden and severe
• Associated with dizziness or fainting
• Accompanied by fever

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6. Inflammatory Bowel Disease (IBD)

Conditions such as Crohn's disease or ulcerative colitis can cause persistent lower abdominal pain.

Symptoms:

• Chronic diarrhea
• Blood in stool
• Weight loss
• Fatigue

Unlike IBS, IBD involves inflammation that can damage the digestive tract and requires medical treatment.

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7. Hernia

An inguinal hernia may cause discomfort in the lower abdomen or groin.

Signs:

• Bulge in groin area
• Pain when lifting or coughing
• Pressure or heaviness

Surgery is often required if symptoms persist or worsen.

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8. Colon Cancer (Less Common but Serious)

Persistent pain in lower left abdomen can occasionally be linked to colon cancer, especially in adults over 50 or those with risk factors.

Warning signs:

• Blood in stool
• Unexplained weight loss
• Change in bowel habits
• Persistent fatigue

While this cause is far less common than constipation or diverticulitis, it must not be overlooked. Screening colonoscopies are highly effective in prevention and early detection.

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When Should You Seek Immediate Care?

Call a doctor or seek urgent care if you experience:

• Severe or worsening abdominal pain
• Fever above 101°F (38.3°C)
• Blood in stool or black stools
• Persistent vomiting
• Fainting or dizziness
• Sudden sharp pain

These could indicate infection, obstruction, internal bleeding, or other serious conditions.

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How Doctors Diagnose Lower Left Abdominal Pain

Your doctor may use:

• Physical exam
• Blood tests
• Urine tests
• CT scan or ultrasound
• Colonoscopy (if indicated)

The goal is to rule out serious causes while identifying treatable ones.

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Practical Steps You Can Take Now

If your pain is mild and you have no emergency symptoms:

• Track when pain occurs
• Note bowel movement patterns
• Drink more fluids
• Increase fiber slowly
• Avoid large, heavy meals
• Reduce stress

However, if pain persists beyond a few days or keeps returning, it is time to speak to a doctor.

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The Bottom Line

Pain in lower left abdomen is common and often caused by manageable conditions like constipation, IBS, or mild infections. However, persistent or worsening pain deserves medical attention.

Do not ignore:

• Pain with fever
• Blood in stool
• Severe or sudden pain
• Unexplained weight loss

Before your doctor's appointment, take advantage of Ubie's AI-powered symptom checker test to help identify potential causes based on your specific symptoms and prepare informed questions for your healthcare provider.

Most importantly, always speak to a doctor if your symptoms could be serious or life-threatening. Early evaluation often leads to simpler treatment and better outcomes.

Persistent abdominal pain is your body's way of asking for attention. Listening to it—and acting appropriately—can make all the difference.