Urgent. Read this first.
A limping child with a fever, severe pain, refusal to bear weight, or who appears unwell needs same-day medical assessment. Do not wait. Contact your GP urgently, call 111, or go to A&E. A hot, swollen joint with a fever can indicate septic arthritis, which is a medical emergency that requires treatment within hours.
Why Is My Child Limping With No Obvious Injury?
A child limping with no obvious injury usually has a cause that is not visible on the surface. Common reasons include irritable hip (transient synovitis), Perthes disease, growth-related changes, or an infection in the joint. Most causes are treatable, but some need urgent attention, especially if fever or severe pain is present. A proper assessment is always the right next step.
Key takeaways
- A limp without a clear injury is common in children and always deserves investigation.
- Fever combined with a limp is a red flag. Seek urgent medical help the same day.
- The most likely cause depends heavily on the child's age.
- Hip problems in children often show up as knee or thigh pain, not hip pain.
- Imaging can help identify or rule out structural causes once a doctor has assessed your child.
It is understandably alarming when your child starts limping and you cannot see a bruise, a twist, or a fall to explain it. The good news is that most causes are not serious. But a limp always means the body is protecting something, and finding out what that is matters. This page explains the common reasons, the warning signs that need urgent action, and when imaging can help.
What are the warning signs of a serious limp in a child?
The signs below suggest your child may need same-day medical attention. If any of these are present, contact your GP, call 111, or attend A&E.
A temperature alongside a limp or refusal to walk can indicate a joint infection (septic arthritis). This is a medical emergency.
Pain that stops your child sleeping, sitting still, or that gets worse over days rather than better.
A child who will not put any weight on one leg, or who screams when you try to move a joint, needs urgent assessment.
Weight loss, night sweats, fatigue, or a child who just does not seem right alongside a new limp.
If none of these red flags apply and your child is otherwise well, a non-urgent GP appointment within a few days is usually appropriate. Understanding when to see a specialist can help you decide.
What causes a child to limp with no injury?
Several conditions can make a child limp without any obvious trauma. The most common ones depend on the child's age, but the list below covers the main possibilities your doctor will consider.
Also called transient synovitis. The most common cause in young children. Often follows a viral illness. Usually resolves within two weeks.
Reduced blood supply to the ball of the hip joint. Most common between ages four and eight. Causes a gradual limp and stiffness.
Slipped upper femoral epiphysis. The growth plate at the top of the thigh bone slips. Most common in teenagers. Needs prompt treatment.
A bacterial infection inside a joint. Rare but serious. Causes fever, severe pain, and refusal to move the joint. A medical emergency.
Less common causes include developmental dysplasia of the hip, stress fractures, juvenile arthritis, and bone or soft-tissue conditions. If left undiagnosed, some hip problems in childhood can progress into hip dysplasia in adults, which is why early investigation matters.
Does the child's age affect what is causing the limp?
Yes. A child's age is one of the most useful clues for working out the likely cause. Doctors use age as a starting point when they assess a limping child.
Toddlers (ages 1 to 3): The most common cause is irritable hip (transient synovitis), especially after a cold or viral illness. Toddlers may simply refuse to walk rather than limp obviously. An unrecognised "toddler's fracture" of the shin bone is also common at this age and can occur from a very minor stumble that the parent did not notice.
Children (ages 4 to 10): Perthes disease becomes more relevant in this age group. The child may complain of hip, thigh, or knee pain, and you might notice a limp that comes and goes over weeks. Irritable hip is still common. Juvenile arthritis can also begin at this stage.
Teenagers (ages 11 and up): Slipped upper femoral epiphysis (SUFE) is the key concern in this group, particularly during growth spurts or in children carrying extra weight. The teenager often describes groin, thigh, or knee pain rather than hip pain. SUFE requires prompt orthopaedic referral.
One important point for all ages: hip problems frequently cause pain in the knee or the front of the thigh, not in the hip itself. This is called referred pain. If your child complains about their knee but nothing seems wrong there, the hip should be checked.
How is a limping child assessed with imaging?
Once a doctor has examined your child, imaging is often the next step. The type of imaging depends on what the doctor suspects.
Standard X-rays are usually the first investigation. They can show bone shape, growth plate problems, and joint spacing. Ultrasound is sometimes used to check for fluid inside the hip joint, which helps distinguish irritable hip from septic arthritis.
For ongoing or complex problems, standing weight-bearing imaging can add information that lying-down scans miss. When a child stands, gravity loads the joints and reveals how bones align under real conditions. Paediatric imaging at ScanAlign uses EOS technology, which captures a full standing image of the legs, hips, and spine in one scan with about 90% less radiation than a standard X-ray, around ten times less. This matters especially for children, who are more sensitive to radiation.
When is MRI the better choice? EOS shows bones, joints, and alignment clearly. For soft tissue, cartilage, or suspected infection inside the joint, MRI is usually the better tool. Your doctor or our radiographer can advise which is most appropriate for your child's situation.
If your child has an ongoing or unexplained limp and your doctor wants further imaging, our specialist radiographer can advise whether a standing scan would help.
Book a free video consultationWhat should I do if my child is limping with no injury?
Your first step depends on how unwell your child seems. Here is a simple guide.
- Fever with a limp
- Severe pain or unable to walk at all
- Hot, swollen, red joint
- Child seems generally unwell
- Limp after a significant fall or accident
- Mild limp, child otherwise well
- No fever, eating and sleeping normally
- Limp that comes and goes over weeks
- Knee or thigh pain with no knee problem found
- Limp that has not improved after a week of rest
ScanAlign is a diagnostic imaging clinic, not an emergency service. We do not diagnose or treat your child's condition. What we can do is provide detailed, low-dose standing imaging when your doctor or specialist needs it to understand what is happening structurally. Learn more about ScanAlign, low dose standing imaging.
Frequently asked questions
It is worth getting it checked even if your toddler seems happy. Children are not always good at reporting pain. The most common cause at this age is irritable hip, which usually settles on its own. But a GP visit within a few days is sensible to rule out anything else.
Yes. Transient synovitis (irritable hip) often follows a viral infection. The lining of the hip joint becomes inflamed, causing a limp. It usually clears up within one to two weeks with rest.
This is called referred pain. The nerves that supply the hip also supply the knee and thigh, so the brain can interpret hip problems as knee pain. Doctors routinely check the hip whenever a child presents with unexplained knee pain.
Common Perthes disease symptoms include a limp that comes and goes, stiffness in the hip (especially when turning the leg inward), and pain in the groin, thigh, or knee. It usually affects children between four and eight years old, and is more common in boys.
Go to A&E if your child has a fever with a limp, a hot or swollen joint, severe pain, refusal to bear any weight, or if your child seems generally unwell. A hot, swollen joint with fever could be septic arthritis, which needs treatment within hours.
Yes. ScanAlign offers paediatric imaging using EOS technology, which uses about 90% less radiation than a standard X-ray, around ten times less. This is particularly beneficial for children. You can learn more about paediatric imaging at ScanAlign.
No formal referral letter is required. You can book a paediatric assessment directly. However, for a limping child, we always recommend a GP or specialist assessment first to rule out anything that needs urgent treatment.
When a child lies down, gravity is removed and the muscles relax. This can hide alignment problems that only appear when the body is weight-bearing. A standing scan shows the hips, knees, and spine under real loading conditions, which gives a more complete picture of how the bones line up.
Pricing depends on the scan area required. ScanAlign is a private, self-pay clinic. You can find current pricing information on our FAQs and cost page.
Not always. Muscle strains, growing pains, or even a splinter or verruca on the foot can cause a limp. Rarely, conditions outside the musculoskeletal system can be responsible. Your GP can help work out the most likely cause and decide what investigations are needed.
Need clarity on your child's limp?
If your child has an ongoing or unexplained limp and you want to understand the structural picture, our specialist radiographer can advise whether imaging would help.
Book a free video consultationSources
- NHS. "Limping in children." nhs.uk. Accessed 2024.
- Royal College of Emergency Medicine. "Management of the limping child." Best practice guidelines.
- Perry DC, Hall AJ. "The epidemiology and aetiology of Perthes disease." Orthopaedic & Trauma, 2011;25(4):276-283.
Written by Abbas Dhami (Specialist Diagnostic Radiographer).
This page is general information and not a diagnosis.
ScanAlign is the trading name of CoreMed Solutions Ltd and operates under The Harley Street Hospital's CQC licence.