I Have an ACL Injury and My Knee Swells After Running

Your knee swelling after running with an ACL injury can leave your knee feeling full, tight, or stiff because repeated running can aggravate an injured knee.

Running can make swelling in an ACL-injured knee much more noticeable than everyday walking. You may finish a run and notice that your knee feels puffy, tight, or harder to bend, or you may see swelling develop around the kneecap or throughout the knee.

The swelling may not be obvious during the first few minutes of running. As you continue taking strides, the knee can become increasingly uncomfortable, and the swelling may stand out more once you slow down or stop. Your knee may also feel stiff afterward, especially when you try to bend it fully.

Swelling Builds As You Keep Running

Your knee may feel fine at first, then become full or swollen as the run continues.

The first few minutes may seem manageable, but continued running can make the injured knee increasingly sore, tight, or swollen. The repeated bending and impact of each stride can aggravate the knee when it has not recovered enough to tolerate running.

Your Knee Feels Tight After You Stop

The swelling may become easier to notice when you finish running and your knee starts to stiffen.

You might notice pressure around the knee, reduced comfort when bending it, or a feeling that the joint has become puffy after your run. The symptoms can linger after you stop because the knee has been repeatedly stressed during the activity rather than having time to settle between movements.

Why Your Knee Keeps Swelling After Running

Your knee has a hard time healing when blood flow and circulation are limited.

Tendons, ligaments, and other soft tissues naturally receive less blood supply than many other parts of the body. Because of this, they often take longer to heal after repeated stress or injury, leaving you more vulnerable to lingering pain and a cycle of reinjury.

When circulation through the area remains limited, injured tissues have a harder time receiving the vital oxygen and nutrients they need to repair and heal. This can leave your knee feeling stiff, tight, weak, or painful during everyday movement and activity.

What Can Help Your Knee Feel Better

Your knee starts feeling better when blood flow and circulation improve.

Chinese herbs have been used for centuries to promote healthy blood flow and circulation. Their medicinal properties help break up stagnant blood and fluids that remain trapped around injured tissues, interfering with circulation. As circulation improves, blood flows more freely through the area, allowing those tissues to receive the oxygen and nutrients they need to heal properly.

Topical herbal remedies made with these Chinese herbs can help relieve pain while improving blood flow and circulation to injured tissues. The right product depends on your symptoms and whether you're in the acute or chronic stage of recovery.

If you have pain, swelling, inflammation, or bruising, Acute Sinew Liniment helps relieve these symptoms by increasing circulation and dispersing stagnant blood and fluids around the injured area to speed recovery. During the acute stage of healing, getting circulation moving early allows injured tissues to receive the fresh blood, oxygen, and nutrients they need to repair and heal.

If your injured area is especially swollen, red, or warm to the touch after a recent injury or flare-up, Sinew Herbal Ice is also used to reduce swelling and inflammation while restoring normal circulation so you can quickly regain range of motion. While traditional ice is commonly used to reduce swelling, Sinew Herbal Ice acts as an ice alternative to reduce swelling and inflammation while also dispersing accumulated blood and fluids to speed the healing process.

If you no longer have swelling or inflammation, but still have pain, stiffness, weakness, or sensitivity in cold and damp weather, Chronic Sinew Liniment helps relieve these symptoms by strongly stimulating circulation and increasing blood supply to injured tendons and ligaments to promote their healing. This is especially important because tendons and ligaments naturally receive less blood supply, which is why chronic injuries can take longer to heal.

If you have residual pain and stiffness, or the area becomes more painful in cold weather, Sinew Injury Poultice is also used to significantly stimulate circulation to injured tendons and ligaments to further promote their healing. By strongly increasing circulation, it counteracts the reduced blood flow caused by cold weather that commonly aggravates chronic tendon and ligament injuries.

If you exercise, play sports, or do other strenuous activities, Sinew Sports Massage Oil warms and stimulates muscles for exertion and relieves muscle tightness and soreness after activity. Warming and preparing your muscles before activity can improve flexibility, enhance performance, and reduce the risk of injury.

Frequently Asked Questions

You may also find these commonly asked questions helpful.

Why does my knee swell after running with an ACL injury?

Running repeatedly stresses an ACL-injured knee, which can cause swelling to become more noticeable during or after the activity.

Why does my knee swell after I stop running with an ACL injury?

Swelling can become easier to notice after running because the knee has been repeatedly stressed throughout the activity.

Can running make an ACL injury swell more?

Yes. Running can increase stress on an injured knee and make swelling, soreness, or stiffness more noticeable.

Should I run if my knee swells after an ACL injury?

If running causes swelling, pain, or instability in your injured knee, stop and have your knee evaluated before continuing.

How long can knee swelling last after running with an ACL injury?

The duration varies with the severity of the injury and your recovery, so persistent or recurring swelling should be evaluated by a qualified healthcare professional.

The information provided here is intended to help you better understand your symptoms and recovery, but it is not a substitute for professional medical advice, diagnosis, or treatment.

Persistent, severe, or worsening symptoms should be evaluated by a qualified healthcare professional.