Lower back pain and nausea can be scary when they happen together. You might feel sick to your stomach and also have a deep ache in your lower back. These two symptoms can show up at the same time, and it’s not always clear why. Sometimes, it’s just a stomach bug or muscle strain. Other times, it could be a sign of something more serious, like kidney trouble or a problem with your spine.
Many people feel confused when they deal with both back discomfort and stomach issues. But don’t worry—this guide will help you understand what might be causing it. You’ll also learn when it’s time to get help and how to feel better.
Why Do Lower Back Pain and Nausea Happen Together?
Feeling sick and having lower back pain at the same time can be confusing. But your body has a few ways of linking these two symptoms.
Sometimes, the nerves in your body send mixed signals. Other times, the pain in your back is so strong that it makes your stomach upset. In some cases, your body’s natural response to pain or illness—called inflammation—can also cause both nausea and back pain.
Let’s break down the three main reasons why this happens.
Shared Nerve Signals Between the Gut and Spine
Your spine and stomach are closer friends than you might think.
Nerves from your back and stomach connect through a big nerve called the vagus nerve. This nerve sends signals between your brain, stomach, and other body parts. So, if something is wrong in your lower back, your brain might also feel it in your stomach.
That’s why pain in one area, like the lower back, can also cause nausea or belly discomfort. The body uses the same nerve pathways to talk about both.
Pain-Induced Nausea
Sometimes, pain is just too much for the body to handle.
When back pain is very strong, your body reacts in many ways. One reaction is nausea. This is called pain-induced nausea, and it’s a common response when your brain is overwhelmed.
If your lower back pain is sharp, throbbing, or lasts for a long time, it may also make you feel dizzy, sweaty, or sick to your stomach.
Inflammation and Body Response
Inflammation is your body’s way of fighting off injury or illness. But it can also spread and cause problems in other areas.
For example, if there’s swelling in your back due to a muscle injury or infection, your whole body can feel off. Inflammation can mess with your digestive system and lead to symptoms like nausea or even bloating.
This is your body’s way of saying, “Hey, something’s wrong. Please slow down and rest.”
Common Conditions That Cause Both Lower Back Pain and Nausea
Lower back pain and nausea can happen at the same time for many reasons. Sometimes it’s due to a health problem inside the body. Other times, it’s a side effect of stress, medication, or even pregnancy.
Below are some common conditions that can cause both symptoms. Knowing what might be behind your pain and nausea can help you find the right care.
Kidney Infections or Stones
Kidney problems often start with sharp pain in your lower back or side.
If you have a kidney infection or kidney stone, you may also feel like throwing up. These problems can also cause fever, chills, and burning when you pee. The pain can come and go or feel very strong.
If you think this might be the cause, talk to a doctor right away.
Pancreatitis
Pancreatitis is when the pancreas gets swollen or inflamed.
It causes strong pain in the upper or middle back. This pain often comes with nausea, bloating, or even vomiting. The pain may get worse after eating or lying down.
This is a serious condition, and it needs medical care.
Ulcers and GI Problems
Stomach ulcers or acid reflux can cause both belly pain and lower back pain.
These problems often come with nausea, heartburn, or a full feeling after eating. Sometimes, stomach pain spreads to the back when the stomach lining is irritated.
Constipation
Constipation means it’s hard to pass stool or you don’t go to the bathroom often.
When stool builds up in the bowels, it can press on nearby nerves and muscles. This pressure can cause lower back pain and make your stomach feel upset or even nauseous. You might also feel bloated, crampy, or full.
If you often feel this way, it could be more than just a stomach problem. 🔗 Learn more in our guide on constipation and lower back pain to understand why both symptoms happen together and what you can do about it.
Spinal Conditions (Like Herniated Disc or Nerve Compression)
Problems in the spine can press on nearby nerves.
A herniated disc or pinched nerve can cause pain that spreads to other parts of the body. This pain may lead to nausea due to stress, poor sleep, or discomfort. Sometimes, your balance is off too, which can make your stomach feel upset.
Liver or Gallbladder Issues
If your right side hurts and you feel sick, your liver or gallbladder may be involved.
Gallstones or liver problems can cause pain under the ribs or in the back. They can also bring on nausea, especially after eating fatty foods.
If your pain comes with yellow skin or dark pee, see a doctor.
Pregnancy
During pregnancy, your body changes in many ways.
These changes can cause lower back pain from the extra weight and shifting posture. Hormones also affect your muscles and joints. Nausea, especially in early or late pregnancy, is very common too.
If you’re pregnant and the pain or sickness gets worse, talk to your healthcare provider.
Stress and Anxiety
Stress doesn’t just affect your mood—it affects your body too.
Tense muscles can lead to back pain. At the same time, stress can upset your stomach and make you feel nauseous. It’s a common mix of symptoms when your body is under pressure.
Relaxation, breathing exercises, or gentle stretching can help.
Certain Medications
Some medicines can cause stomach upset and back pain.
Painkillers, antibiotics, and anti-inflammatory drugs can have side effects. These may include nausea, dizziness, or digestive problems. Always read labels and talk to a doctor if symptoms appear after starting a new medicine.
When Should You See a Doctor?
Sometimes, lower back pain and nausea go away on their own. But there are moments when you should get medical help. If symptoms last too long or get worse, it’s better to be safe. Your body may be trying to tell you something more serious is going on.
Let’s look at some signs that mean you should see a doctor.
Symptoms Last More Than 48 Hours
If your pain or nausea doesn’t get better after two days, it could be more than a simple stomach bug or back strain. Ongoing pain may need treatment, especially if it keeps you from sleeping or doing daily tasks.
Pain Is Sharp or Spreads to Other Areas
A sharp, stabbing pain or pain that spreads down your legs or to your belly can be a warning sign. This could mean a pinched nerve or a deeper health issue.
Vomiting, Fever, or Trouble Urinating
Throwing up, running a fever, or not being able to pee normally are red flags. These could be signs of an infection or kidney problem. Don’t wait—call your doctor if you notice any of these.
You Are Pregnant or Have a Known Condition
If you’re pregnant, even mild symptoms can mean a lot. Always check with your doctor if you feel sick or have back pain. The same goes if you already have a health condition like kidney disease, ulcers, or gallbladder problems.
Injury-Related Back Pain
Did the pain start after a fall, sports injury, or car crash? Even if you feel okay at first, injuries can show up later. It’s important to get checked to rule out damage to your spine or muscles.
How to Treat Lower Back Pain and Nausea
When you have lower back pain and nausea, the best way to feel better is to find out what is causing the problem. Treating the root cause helps you heal faster and stop symptoms from coming back. Along with medical care, some simple home tips and lifestyle changes can make a big difference.
Find and Treat the Root Cause
First, see a doctor to get a proper diagnosis. They will check your symptoms and may order tests like X-rays or blood work. Knowing the exact cause helps your doctor give the right treatment. For example, if you have a kidney infection, you will need antibiotics. If it’s a muscle strain, rest and physical therapy might help.
Home Care Tips
At home, try to rest and avoid heavy activity. Use a heating pad or ice pack on your lower back for 15–20 minutes. Heat helps relax muscles. Ice reduces swelling.
Drink plenty of fluids. Staying hydrated stops nausea from getting worse. Eat mild foods like toast, rice, or bananas that are gentle on your stomach.
Ginger tea can calm your stomach. Some people find anti-nausea tablets helpful, but only take them if your doctor says it’s okay.
Lifestyle Changes That Help
Good habits can keep your back and stomach healthy. Sit and stand with good posture to avoid back strain. Sleep on a firm mattress and try to lie on your side with a pillow between your knees.
Light stretching or yoga helps keep your back muscles strong and flexible. Try deep breathing or meditation to reduce stress, which often makes pain and nausea worse.
Avoid heavy, greasy meals and drink water throughout the day to keep your digestion smooth.
Medical Treatments
If your back pain and nausea come from an infection, antibiotics will help clear it up. For pain, doctors may recommend safe medicines like acetaminophen or ibuprofen.
Physical therapy is a great way to improve back strength and ease pain. Therapists teach exercises and ways to move that protect your back.
In rare cases, surgery might be needed. This happens when a serious problem like a herniated disc or nerve compression doesn’t get better with other treatments.
How to Prevent Lower Back Pain and Nausea
Preventing lower back pain and nausea is easier when you take care of your body every day. Healthy habits help keep your muscles strong and your digestion working well. By paying attention to your body, you can avoid problems before they get worse.
Maintain Healthy Habits
Eating a balanced diet gives your body the nutrients it needs. Include fruits, vegetables, whole grains, and lean proteins in your meals. Drinking plenty of water keeps your body hydrated and helps digestion run smoothly.
Try to exercise regularly. Activities like walking, swimming, or stretching keep your back muscles strong and flexible. Avoid sitting for too long. If you have a desk job or study a lot, take short breaks to stand or walk around.
Listen to Your Body
Your body sends signals when something is wrong. Don’t ignore pain or discomfort. If your lower back hurts or you feel sick, pay attention and rest.
Act early if you notice signs of illness. See a doctor if pain or nausea lasts more than a day or gets worse. Early treatment can stop problems before they become serious.
Conclusion
Back pain and feeling sick in your stomach often happen together. Sometimes, it’s just a small problem that goes away with rest. But other times, it can be a sign of something more serious.
If your pain or nausea lasts a long time or gets worse, always talk to a doctor. They can help find the cause and give you the right treatment.
Remember, taking care of your back and listening to your body can keep you feeling good and healthy.
Dr. Michael Hartman, DPT, is a skilled physical therapist with 15+ years of experience in rehab and pain management. He specializes in musculoskeletal and pelvic health therapy, using evidence-based, personalized care. Dr. Hartman is passionate about helping patients move better, feel stronger, and live pain-free.
