The short answer: lower right back pain is usually caused by a problem in the back itself, such as a strained muscle, a slipped disc or an irritated sacroiliac joint. It usually gets better on its own. Less often it comes from a kidney stone, a kidney infection or appendicitis. Fever, pain when you pee, severe belly pain or numbness in your legs mean you should get checked quickly.
Cleveland Clinic says lower right back pain can happen anywhere on the right side of your back between your hips and the bottom of your rib cage.
What does lower right back pain feel like?
Lower right back pain can feel aching, dull, sharp, stabbing, burning or cramping, and the feel depends on the cause. Cleveland Clinic also lists pins and needles, tingling, spasms and a twisting feeling. What helps you narrow it down is what makes it worse and what else comes with it.
What causes lower right back pain?
A common cause of lower right back pain is a strained muscle or ligament in your back, the NHS and AAOS OrthoInfo say. Cleveland Clinic sorts the causes into problems with the back itself, nerve problems, whole-body conditions and pain referred from organs. The NHS adds that it’s not always obvious what causes back pain. Here are the main ones, with the clues that point to each:
| Cause | How it tends to feel | Clues that point to it | How quickly to act |
|---|---|---|---|
| Muscle strain or sprain | A dull ache or spasm beside the spine | Started after lifting or activity; worse when you bend, twist, lift, laugh or sneeze | Self-care; see a doctor if no better after a few weeks |
| Slipped (herniated) disc | Back pain that can spread to the buttock, hip or leg | Numbness or tingling, weakness, trouble bending or straightening | See a doctor if it doesn’t settle; emergency if both legs are affected |
| Sacroiliac (SI) joint | Low back and buttock pain, sharp or a steady ache | Worse after sitting or standing a long time or turning your hips; morning stiffness lasting over an hour | See a doctor if no better in a week |
| Kidney stone | Severe pain in the side or lower back that comes in waves | Pain spreading to the groin, feeling sick, cloudy or bloody pee, peeing often | Urgent same-day help |
| Kidney infection | Pain in the lower back or side, just under the ribs | High temperature, shivers, feeling sick, burning when you pee | Urgent same-day help |
| Appendicitis | Pain that starts near the belly button and moves to the lower right tummy | Worse when you move or cough, fever, sickness, loss of appetite | Emergency if pain is severe |
| Gynecological causes | Pain in the lower tummy and back, or sudden sharp pelvic pain | Endometriosis, pelvic inflammatory disease, fibroids or an ovarian cyst; pain linked to periods or sex | See a doctor; urgent if sudden and severe |
| Other organ causes | Referred pain felt in the back | Gallbladder or pancreas problems, prostatitis, shingles with a one-sided rash, abdominal aortic aneurysm | See a doctor; severe sudden pain is an emergency |
Sources for the table: Cleveland Clinic, the NHS and MedlinePlus.
If the pain sits lower, around your hip or buttock, our guide to what hip pain means by where it hurts may fit better. If it runs down the back of your leg, start with sciatica exercises.
Is lower right back pain kidney related?
Lower right back pain is sometimes kidney related, but the kidney pattern is usually different from a sore back. Cleveland Clinic says you feel kidney pain under your ribs, on one or both sides of your spine, and it often feels deeper. A strained muscle usually gets worse with bending or twisting, while kidney pain doesn’t usually change when you move.
The other big clue is company. MedlinePlus says that if flank pain comes with fever, chills, blood in your urine or a frequent, urgent need to pee, a kidney problem is the likely cause. Our side-by-side guide to back pain vs kidney pain goes through each difference.
Can lower right back pain be appendicitis?
Lower right back pain can be a sign of appendicitis, but appendicitis usually shows itself in the belly first. Cleveland Clinic lists it among the organ problems that can refer pain to your lower back. The NHS describes the usual pattern: pain starts around your belly button, then over a few hours moves to the lower right side of your tummy and gets worse.
That pain may feel worse when you move, cough or press on the area, and a little better with your knees pulled up to your chest. Fever, feeling sick and losing your appetite can come with it. The NHS notes some people don’t have the typical pain, and this is more likely in pregnancy, young children and older people. Severe tummy pain needs emergency care.
What causes lower right back pain in women and men?
In women, lower right back pain can come from the reproductive organs as well as the back. Cleveland Clinic names endometriosis, pelvic inflammatory disease and uterine fibroids. The NHS lists pain in the lower tummy and back as a symptom of endometriosis, often with severe period pain, and says an ovarian cyst can cause a dull, heavy feeling or sudden sharp pelvic pain. Cleveland Clinic says lower back pain on either side is very common in pregnancy, and notes that pregnancy hormones can make the sacroiliac joints widen and rotate.
In men, Cleveland Clinic lists prostatitis and testicular torsion as causes of referred back pain. Kidney stones are worth keeping in mind too: Cleveland Clinic says they’re most common in men in their 30s and 40s, and about 1 in 10 people get one in their lifetime.
When should you worry about lower right back pain?
Worry about lower right back pain if it comes with weakness or numbness in your legs, loss of bladder or bowel control, fever or severe belly pain. Numbness around your bottom, genitals and inner thighs, problems in your legs and bladder or bowel changes can be signs of cauda equina syndrome. AAOS OrthoInfo calls it rare, but a surgical emergency, because the squeezed nerves control the bladder and bowel.
Call 911, your local emergency number, or go to the ER if you have back pain and:
- Pain, tingling, weakness or numbness in both legs
- Loss of feeling around your genitals or bottom
- Changes in your bladder or bowels, such as trouble peeing or losing control
- Severe belly pain, especially low on the right
- Pain so severe it’s hard to move, or pain that becomes severe very suddenly
- Chest pain, or pain that started after a serious accident
Don’t drive yourself. These signs come from the NHS and Cleveland Clinic.
Get a same-day appointment if you have back pain and: a high temperature or shivers, pain when you pee, blood in your pee, feeling or being sick, or pain that’s getting worse quickly. The NHS says a kidney infection can lead to sepsis if it isn’t treated.
See your doctor if: the pain lasts a week without getting better, gets in the way of daily life, comes with night sweats, groin pain or pain during or after sex, or comes with weight loss you can’t explain. Cleveland Clinic and the NHS both list these.
How do you relieve lower right back pain?
To relieve lower right back pain from a strained muscle or stiff joint, keep moving gently and use heat or ice. These steps come from the NHS and suit pain that started after activity, changes with movement and comes with no fever or urine changes:
- Keep going with your day. The NHS says to stay active and not to stay in bed for long periods.
- Use ice or heat, wrapped in a tea towel. Ice can ease pain and swelling. Heat can relieve stiffness and muscle spasms.
- Try gentle exercises. Start with these five exercises for lower back pain, and stop if the pain gets worse.
- Get up from your chair often. If long sitting sets it off, see lower back pain from sitting.
- Ask a pharmacist about pain relief. The NHS suggests anti-inflammatories such as ibuprofen for back pain, but they may not suit everyone. Cleveland Clinic advises asking a provider first if your kidneys might be involved.
Keep our free back pain rescue card on your phone for bad days. For the full list of what helps and what doesn’t, read how to get rid of back pain. If it keeps coming back, why your lower back still hurts covers the habits that keep it going.
Your next step
Today, check the clues: fever, pain when you pee and severe belly pain point away from your back, so get those seen. If it’s a sore back, take a short walk now and try one gentle exercise. If you’d like a day-by-day routine, The Back Pain Reset below sets out ten-minute sessions for 28 days.
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Quick questions
Is lower right back pain serious?
Lower right back pain is usually not serious. Cleveland Clinic says it usually gets better on its own, and the NHS says back pain often improves within a few weeks. Get urgent help if it comes with fever, pain when you pee, severe belly pain, numbness in both legs or loss of bladder or bowel control.
Is lower right back pain my kidney?
It can be, but a sore back is more common. Kidney pain is usually felt deeper, under the ribs to one side of the spine, and doesn’t usually change when you move, according to Cleveland Clinic. Fever, chills, blood in your pee or needing to pee often make a kidney cause more likely.
Can lower right back pain be appendicitis?
Yes, Cleveland Clinic lists appendicitis as a cause of referred lower back pain. The NHS says appendicitis pain usually starts around the belly button and moves to the lower right tummy over a few hours, getting worse. Severe tummy pain, especially with fever or vomiting, needs emergency care.
Can constipation cause lower right back pain?
Gut problems can cause pain felt in the side or back. MedlinePlus lists gastrointestinal disease as a cause of flank pain, and Cleveland Clinic says to call a provider right away if flank pain comes with constipation, diarrhea or bloating. Pain that moves to the lower right tummy needs urgent checking for appendicitis.
Is lower right back pain normal in pregnancy?
Yes. Cleveland Clinic says lower back pain on either side is very common in pregnancy, and pregnancy hormones can make the sacroiliac joints widen and rotate. The NHS says to get an urgent appointment if you’re pregnant and think you may have a kidney infection, with fever or pain when you pee.
How do you relieve lower right back pain fast?
There’s no instant fix, but the NHS suggests staying active, using a wrapped ice pack or heat pack and doing gentle back exercises. Avoid long spells in bed. If there’s any chance the pain is from your kidneys, ask a pharmacist or doctor before taking an anti-inflammatory.
This article is general information, not medical advice. Lower right back pain has many causes, and only a doctor can find yours. Get emergency help for numbness in both legs, loss of bladder or bowel control, or severe belly pain. If you take medicines, check with a pharmacist or doctor before adding a painkiller.
Sources
- Cleveland Clinic. Lower Right Back Pain: Causes and Pain Relief, 2026
- Cleveland Clinic. Flank Pain: Causes, Symptoms, Diagnosis and Treatment
- Cleveland Clinic. Sacroiliitis
- Cleveland Clinic. Kidney Stones
- NHS. Back pain
- NHS. Slipped disc
- NHS. Kidney stones
- NHS. Kidney infection
- NHS. Appendicitis
- NHS. Endometriosis
- NHS. Ovarian cyst
- MedlinePlus. Flank pain, 2025
- AAOS OrthoInfo. Low Back Pain
- AAOS OrthoInfo. Cauda Equina Syndrome