Abdominal Pain: When to Go to Urgent Care vs. the ER

Stomach pain can mean a hundred different things — and knowing when to seek urgent care for abdominal pain vs. head to the ER is genuinely confusing. CityHealth San Leandro provides same-day urgent care for abdominal pain, helping you get a diagnosis and relief without a long ER wait. Learn more about Urgent Care for Gallbladder Pain at CityHealth.

Common Causes of Abdominal Pain by Location

Where your pain is located is one of the first clues to what’s causing it. Providers use abdominal quadrants to narrow down the source:

Upper Right Abdomen

• Gallbladder issues (gallstones, cholecystitis) — often worse after fatty meals
• Liver problems (hepatitis)
• Kidney stone (right kidney)

Upper Left Abdomen

• Gastritis or stomach ulcers — burning pain, often relieved by food or antacids
• Pancreatitis — severe, constant pain radiating to the back
• Kidney stone (left kidney)

Lower Right Abdomen

• Appendicitis — starts around the navel, moves to lower right; worsens with movement
• Ovarian cyst or ectopic pregnancy (in people with ovaries)
• Hernia
• Inguinal lymph node inflammation

Lower Left Abdomen

• Diverticulitis — common in adults over 40, often with fever and constipation
• Ovarian cyst (left side)
• IBS flare

Diffuse / All Over

• Gastroenteritis (stomach bug)
• IBS (irritable bowel syndrome)
• Constipation
• Food poisoning
• Gas and bloating

Around the Navel

• Early appendicitis (pain often migrates to right lower quadrant)
• Mesenteric lymphadenitis (in children)

When to Go to Urgent Care for Abdominal Pain

Urgent care at CityHealth can evaluate and treat many causes of abdominal pain — including ordering bloodwork, urinalysis, and urine cultures on-site. Come in if:

• Mild to moderate stomach pain lasting more than a few hours without improvement
• Pain with burning or frequency when urinating — possible UTI or kidney infection
• Nausea, vomiting, and diarrhea that has lasted more than 24 hours
• Abdominal cramping with fever — needs evaluation for infection
• Bloating with no bowel movement for 3+ days and increasing discomfort
• Pain that comes in waves (crampy/colicky) — possible kidney stone, gallstone, or bowel spasm
• Recurrent abdominal pain you’ve had before that hasn’t been explained
• Possible medication side effects (stomach pain after starting a new prescription)
• Heartburn or GERD that hasn’t responded to over-the-counter antacids

When to Go to the Emergency Room for Abdominal Pain

Some causes of abdominal pain are surgical or life-threatening emergencies. Go to the ER or call 911 if:

• Sudden, severe pain that’s the “worst of your life” or comes on like a thunderclap
• Rigid, board-like abdomen that’s tender to the lightest touch — possible bowel perforation or peritonitis
• Severe right lower quadrant pain with fever and vomiting — possible appendicitis (needs surgery if confirmed)
• Pain with signs of internal bleeding — dizziness, pale skin, rapid heart rate, blood in stool or vomit
• Pregnancy with significant abdominal pain — possible ectopic pregnancy or placental abruption
• Pain with inability to pass gas or stool for several days plus significant bloating — possible bowel obstruction
• Abdominal aortic aneurysm symptoms (in patients with known AAA): sudden severe pain radiating to back
• Signs of shock: pale/gray skin, cold sweating, rapid weak pulse, confusion

When in doubt, err on the side of caution. Our urgent care providers can help you determine the right level of care if you call ahead.

What Urgent Care Can Evaluate and Test

CityHealth urgent care providers have the tools to do a meaningful workup for many causes of abdominal pain:

• Abdominal exam — location, severity, guarding, rebound tenderness, bowel sounds
• Urinalysis + urine culture — for UTI, kidney infection (UA results in minutes on-site)
• Complete blood count (CBC) — white blood cells elevated in infection or appendicitis
• Comprehensive metabolic panel — liver enzymes, kidney function, electrolytes
• Pregnancy test (urine) — essential for reproductive-age patients with lower abdominal pain
• Rapid flu/COVID testing if viral gastroenteritis is suspected alongside systemic symptoms

For conditions requiring imaging (appendicitis workup, gallstones, kidney stones) or surgical evaluation, we’ll provide appropriate referrals to the ED or imaging center with all your test results in hand.

The UTI-Kidney Connection

A lower UTI (bladder infection) that isn’t treated can progress to a kidney infection (pyelonephritis) — which causes upper abdominal or flank pain, fever, chills, and nausea. If you have abdominal/back pain plus urinary symptoms, come in for a urine culture. We can diagnose and treat kidney infections with antibiotics in one visit, or refer you to higher-level care if your kidney infection is severe.

Gallstones and Gallbladder Pain at Urgent Care

Gallstone pain (biliary colic) typically causes right upper quadrant pain that comes on 30–90 minutes after a fatty meal, lasts 1–4 hours, then subsides. We can evaluate your symptoms and order appropriate bloodwork. However, if you have fever with right upper quadrant pain and tenderness (signs of cholecystitis/gallbladder infection), you need emergency evaluation — this is a potential surgical emergency.

Home Remedies That Actually Help (and Don’t)

For mild stomach pain while you’re deciding whether to come in:

• Heating pad on low — helps with muscle cramps, gas, and menstrual cramps
• Simethicone (Gas-X) — effective for gas and bloating
• Peppermint tea — can relax intestinal muscle spasm
• Small sips of clear fluid — keep yourself hydrated
• Avoid eating large meals, fatty foods, or alcohol until pain resolves

Avoid: Taking opioid pain medications before being evaluated — can mask symptoms and delay diagnosis of serious conditions.

Get Evaluated at CityHealth

Abdominal pain that’s been going on for more than a few hours, getting worse, or accompanied by fever or vomiting — don’t try to wait it out. CityHealth providers at our Oakland Montclair and San Leandro locations can evaluate you same day, run on-site lab work, and either treat you directly or point you to the right next step.

Walk in or book an appointment online. We’re open 7 days a week.

Resources: the National Institutes of Health on abdominal pain

See also: abdominal pain treatment in San Leandro