Why Doesn’t My Knee Bend After ACL Surgery Even Though It Hurts?

Post-ACL (anterior cruciate ligament) surgery, it is not uncommon to experience difficulty bending your knee, even if it causes pain. There are multiple reasons for this, and understanding these can help in managing your post-operative recovery more effectively. This article delves into the common causes of knee stiffness post-ACL surgery and provides effective treatment options.

Swelling and Inflammation

After ACL surgery, the knee often becomes swollen, which can limit the range of motion. Swelling can cause stiffness and make it painful to bend the knee. This is a natural part of the healing process, but it can be managed effectively with proper care and medical guidance.

Pain and Discomfort

Pain can inhibit voluntary movement. If bending your knee causes pain, your body may instinctively avoid doing it to avoid further injury. This can lead to a decreased range of motion and stiffness. It is essential to communicate with your healthcare provider about any persistent pain, as managing it appropriately can help in regaining your knee's normal function.

Scar Tissue Formation

After surgery, scar tissue can develop around the knee joint, which may restrict movement and contribute to stiffness. Scar tissue can form due to the healing process and can impact the knee's flexibility. Physical therapy can help in breaking down this scar tissue and restoring flexibility.

Muscle Weakness

Following surgery, the muscles around the knee may weaken due to disuse. This disuse can make it challenging to perform movements that require bending the knee. Strengthening exercises prescribed by your healthcare provider can help in gradually regaining muscle strength and improving mobility.

Protective Mechanism

Your body may guard the knee to protect the healing tissue, leading to a decreased range of motion. This protective mechanism is vital for the initial healing stages but can cause long-term stiffness if not managed properly. Adequate rest, combined with guided mobility exercises, can help mitigate this issue.

Rehabilitation Protocol

If you’re not following a structured rehabilitation program or if you’re not progressing as expected, this can also lead to stiffness. A well-planned rehabilitation protocol is crucial for a successful recovery. Engaging in activities as advised by your healthcare provider can significantly improve your range of motion and overall recovery.

Recommended Strategies for Improving Knee Flexibility

Physical Therapy: Engaging in a structured physical therapy program can help improve your range of motion and strength. Ice and Elevation: Managing swelling with ice and elevating your leg can help alleviate some discomfort. Gentle Stretching: Incorporating gentle stretching exercises as advised by your healthcare provider can help improve flexibility. Follow-Up with Your Surgeon: If you continue to have significant issues with bending your knee, it is essential to follow up with your orthopedic surgeon. They can assess if there are any complications that need to be addressed.

Discuss with Your Surgeon

Most likely, scar tissue is the cause of your knee stiffness. Your surgeon can discuss the best options for you, such as physical therapy, manipulation under anesthesia, or arthroscopic lysis of adhesions. Each option has its pros and cons, and your surgeon can guide you in making the best decision for your specific situation.

Always consult with your healthcare provider for personalized advice and treatment options. Careful management of knee stiffness post-ACL surgery can significantly enhance your recovery and long-term mobility.