Arthritis in the Knee Common Causes

Arthritis in the knee occurs when there is "wear and tear" of the bones and cartilage in the knee. Resultant friction on the joint causes pain, stiffness and disability. 

Arthritis may occur throughout the knee or just on one side of the joint, most commonly on the inner side.  It can range from mild to severe and knee arthritis symptoms often fluctuate.

Approximately 11% of people over 64 years of age have arthritis in the knee. There is usually no specific cause of arthritis but there are a number of factors which have been found to be linked with the condition. 

Common Causes of Arthritis In The Knee

Here, we will look at the most common causes of arthritis in the knee. You can find out more about the knee arthritis including symptoms, diagnosis and treatment options via the arthritis guide. 

3. Weight

Studies have shown that osteoarthritis is three times more likely in people who are overweight (BMI over 27). The more we weigh, the more weight goes through our bones, and therefore the more likely that the cartilage will get worn away.

It is not as simple as saying that if you are overweight you will get arthritis in the knee and if you are thin you won’t, but there is a direct correlation between the two.

Previous knee surgery can also cause knee arthritis. f you have had to have part of your cartilage removed in the past (known as a menisectomy), you are more likely to develop arthritis in the knee as the cartilage never regrows, which puts more pressure and friction through the bones.

7. Genetics

Genetics is thought to be a possible cause of arthritis in the knee. While we don’t fully understand the link between genes and arthritis, a link definitely exists. One example of this is that our genes may affect the quality/quantity of our cartilage (some people are born with amazing cartilage, others like me aren’t).

Up to 60% of cases of osteoarthritis are thought to be linked with genetics.

The Arthritis Vicious Circle

People often find they go through good spells and bad spells with arthritis in the knee. Stress and tiredness often makes things worse and some people swear that bad weather causes arthritis in the knee to flare up. 

What Can Help Arthritis In The Knee?

For hints and tips on overcoming arthritis or for more information on how to tell if you have arthritis in the knee, have a look at these:

1. Arthritis Overview: Introduction to Arthritis 
2. Symptoms & Diagnosis: The symptoms of OA and how is it diagnosed 
3. Stages of OA: How the disease and symptoms progress
4. Treatment Options: Whole range of ways to treat arthritis knee pain
5. Diet For Arthritis:  Which foods to avoid and which foods can help
6. Natural Arthritis Remedies: Including supplements & homeopathy
7. Knee Replacements: Replacing an arthritic knee with a new one
8. Arthritis Book: Everything you need to know in a handy book

Page Last Updated: 11/01/23
Next Review Due: 11/01/25

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