You bend your knees and hear a crack. You roll your shoulders and hear them click. For many people, these sounds can be surprising, especially if they happen often.
Most of the time, joint cracking or popping is not a sign that something is wrong. If you notice these noises along with pain, swelling, stiffness, or a feeling that the joint is unstable, it could point to an underlying issue that is worth checking out.
Knowing why joints make these sounds can help you tell when it’s normal movement and when it’s time to see a doctor.
Why do joints crack or pop?
Joints make noises for a few reasons, sometimes called crepitus.
A common reason is that gas bubbles form and burst in the fluid that helps lubricate your joints. As joint pressure changes when you move, these bubbles can pop and create that familiar sound.
Sometimes, tendons or ligaments shift slightly over the bones and snap back into place, creating a clicking feeling. This is especially common in areas like the shoulders, knees, and ankles.
As we get older, joint cartilage can become less smooth. This can lead to grinding or crackling sounds when you move, but it doesn’t always mean you have arthritis.
When are joint noises usually normal?
Joint cracking is generally not a cause for concern if it:
- Occurs without pain
- Is not associated with swelling or stiffness
- Does not limit your movement
- Happens occasionally during everyday activities or exercise
Healthy people often notice painless joint noises from time to time. In these cases, you usually don’t need to do anything.
The sound itself usually isn’t a problem unless it comes with symptoms that make it harder to do your usual activities or play sports.
When can joint cracking signal a problem?
While most joint noises are harmless, some symptoms can point to an underlying problem.
Pain or swelling
If cracking comes with pain or swelling, it could signal cartilage wear, tendon irritation, ligament injuries, or joint inflammation. If these symptoms stick around, it’s a good idea to have them checked out to find out what’s going on.
Locking or catching
If a joint catches, locks, or doesn’t move the way it should, it could be due to a meniscus injury in the knee, loose cartilage, or another mechanical issue inside the joint.
Instability or giving way
If a joint feels unstable or keeps giving way, especially after a sports injury or a fall, it might mean there’s ligament damage.
Following an injury
If you notice cracking after twisting, falling, or taking a direct hit to a joint, don’t assume it’s normal. Even if you can still move the joint, you may have an injury to the ligaments, cartilage, or tendons that needs attention.
What can you do if your joints keep cracking?
If your joints make noise but you don’t have pain or other symptoms, you usually don’t need treatment. Still, caring for your joints can help you move more comfortably.
Regular exercise strengthens the muscles that support your joints and improves flexibility. Warming up before activity and gradually increasing intensity may also reduce unnecessary strain.
Maintaining a healthy weight can lessen stress on weight-bearing joints such as the hips, knees and ankles.
If you start to feel pain during exercise, don’t push through it repeatedly. Take a break, switch up your activities, and if the pain doesn’t go away, see a doctor to help prevent further problems.
When should you see an orthopaedic specialist?
Consider seeing an orthopaedic specialist if joint cracking or popping is accompanied by:
- Persistent pain
- Swelling that does not improve.
- Joint locking or catching
- A feeling that the joint is unstable or giving way
- Reduced movement or difficulty performing daily activities
- Symptoms that develop after an injury
An orthopaedic specialist will usually start by asking about your symptoms and examining the joint. Sometimes, they may suggest imaging like X-rays or an MRI to help identify the cause.
Getting checked early can help spot conditions that might improve with simple treatments or, in some cases, require more involved care.
Frequently Asked Questions
Is cracking my knuckles harmful?
Current evidence does not show that cracking your knuckles causes arthritis. However, if it causes pain or swelling, you should have it assessed.
Can exercise cause joint cracking?
Yes. Joint noises may become more noticeable during exercise because joints and tendons move through a wider range of motion. Painless cracking is often normal.
Should I worry if only one joint keeps clicking?
Not necessarily. However, persistent clicking in one joint, along with pain, swelling, locking, or reduced function, should be evaluated.
When to seek advice for persistent joint noises
Most of the time, joint cracking or popping is normal and doesn’t mean there’s a serious problem. What matters most is whether these sounds come with symptoms like pain, swelling, locking, or instability.
If joint noises stick around, start interfering with your daily life, or appear after an injury, it’s a good idea to get them checked out. An orthopaedic specialist from The Orthopaedic Practice can help figure out what’s going on and talk through the best options for your situation.
