Your child says, “My knee hurts,” but there was no fall, no sports injury and no obvious reason. As a parent, that can be confusing—and understandably worrying. Knee pain in children without injury can have several causes, ranging from temporary muscle strain to problems involving the joints, bones or growth patterns. The good news? Most causes are treatable, especially when identified early.
So, what could be behind your child’s knee pain? Let’s look at seven possibilities.
1. Growing Pains
“Growing pains” are often blamed for childhood aches, but true growing pains usually affect both legs and are more commonly felt in the muscles rather than a specific joint.
If your child repeatedly points to one knee, has swelling, limps or experiences pain during the day, don’t automatically assume it is just growing pains in children. A proper assessment may be needed.
2. Overuse or Muscle Strain
Children are constantly running, jumping, cycling, playing sports and exploring.
Sometimes, all that activity can put extra stress on the muscles and structures around the knee. This may cause knee pain after running, climbing stairs or playing sports—even without a specific injury.
Usually, rest and appropriate activity modification help. Persistent pain, however, deserves attention.
3. Patellofemoral Pain
The kneecap needs to move smoothly as the knee bends and straightens. If the kneecap does not track properly, children and teenagers may experience pain around or behind the kneecap.
This is commonly called patellofemoral pain syndrome and may become noticeable while running, squatting, climbing stairs or sitting for long periods.
4. Problems Around the Growth Plate
Children’s bones are still growing, and their growth plates are areas of developing tissue near the ends of bones.
Certain growth-related conditions can cause pain around the knee, particularly in active children and adolescents. One example is Osgood-Schlatter disease, which causes pain and tenderness around the bump below the kneecap.
It can look alarming, but it is generally related to repetitive stress on the developing area.
5. Hip Problems Can Feel Like Knee Pain
Here’s something many parents don’t expect:
Knee pain doesn’t always come from the knee.
Certain hip conditions can cause pain that is felt in the thigh or knee. This is why a pediatric orthopedic surgeon may examine the hip even when your child is pointing directly at the knee.
This is particularly important when knee pain is unexplained or accompanied by a limp.
6. Joint Inflammation or Infection
Sometimes, knee pain can be related to inflammation or infection within or around the joint.
Watch for symptoms such as knee swelling in children, warmth, redness, fever, significant tenderness or difficulty putting weight on the leg.
These signs should not be ignored and require prompt medical evaluation.
7. Alignment or Walking Problems
The way a child stands and walks can influence how forces travel through the knee.
Conditions such as knock knees, bow legs, flat feet or abnormal gait in children may sometimes contribute to discomfort, particularly during physical activity.
Not every difference in alignment causes pain, but persistent symptoms should be evaluated rather than treated based on appearance alone.
When Should You Worry About Your Child’s Knee Pain?
A little soreness after an active day is usually very different from persistent or unexplained pain.
Speak to a pediatric orthopedic specialist if your child has:
- Recurrent or worsening knee pain
- Swelling, redness or warmth
- A persistent limp
- Difficulty walking or running
- Pain that wakes them at night
- Fever associated with joint pain
- Pain that continues despite rest
- Reduced movement of the knee or hip
- Unexplained weight loss or unusual tiredness
The examination helps determine whether your child needs observation, physiotherapy, imaging or further investigation.
Final Thoughts
Knee pain in children without an injury is not something parents need to panic about—but it shouldn’t always be dismissed either.
Sometimes, the answer is simple: an active child has overworked a muscle. Sometimes, the pain is related to growth or alignment. And occasionally, the knee is simply where your child feels a problem that is actually coming from the hip.
The important thing is to look at the whole child, not just the painful knee.
If your child’s knee pain keeps coming back, affects daily activities or comes with other symptoms, a timely pediatric orthopedic evaluation can provide clarity-and, most importantly, reassurance.