Symptoms of Torn ACL

What Are the Symptoms of Torn ACL?

Symptoms of Torn ACL: Torn ACL stands for Torn Anterior Cruciate Ligament. It is a serious knee injury that can cause pain and instability. It occurs when the ligament that connects the shinbone to the thigh bone (the anterior cruciate ligament, or ACL) is stretched beyond its normal range of motion and tears. This injury commonly occurs during sports that involve sudden stops and changes in direction, such as football, basketball, soccer, skiing, and gymnastics. Symptoms of a torn ACL may include pain, swelling, and a feeling of instability. Treatment options include physical therapy, bracing, and sometimes surgery. In this blog, we will discuss the Signs and Symptoms of Torn ACL.

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5 Signs and Symptoms of Torn ACL

1. Pain

Pain is one of the most common symptoms of a torn ACL. If a person has a torn ACL, they may experience a sudden, sharp pain in their knee that is difficult to ignore. The pain may be accompanied by swelling and instability of the knee joint. The affected area may also be tender to the touch. In some cases, the person may not be able to bear any weight on the affected leg. Other symptoms of a torn ACL can include clicking or popping noises in the knee joint when the knee is moved and a feeling of the knee “giving out” when a person tries to walk or stand.

2. Swelling

A torn Anterior Cruciate Ligament (ACL) is a common knee injury that can cause swelling as a symptom. Swelling of the knee is usually the first sign that something is wrong and can be a result of a tear in the ACL.

Swelling caused by a torn ACL usually occurs within the first few hours after the injury. The knee may become swollen, stiff, and painful. It can also appear red and warm to the touch. Swelling is caused by inflammation, which is a natural response of the body to injury.

The swelling associated with a torn ACL may increase with certain activities, such as running or jumping. It can also occur with prolonged standing or sitting. If left untreated, the swelling may become worse and the knee may become increasingly unstable.

3. Difficulty Moving the Knee

When the ACL is torn, it can be difficult to move the knee. People may find it difficult to move the knee in any direction, including bending or straightening. They may also experience pain, instability, and swelling. In some cases, a popping or snapping sensation may be felt. In severe cases, the knee may give out completely.

4. Instability

Instability is one of the most common symptoms of a torn anterior cruciate ligament (ACL). The ACL is a band of tissue connecting the femur to the tibia in the knee joint. It provides stability and prevents excessive forward movement of the tibia. When the ACL is torn, the knee becomes unstable and can give way, resulting in a feeling of insecurity and a fear of further injury.

Instability is usually the first symptom noticed after a torn ACL. This occurs when the knee suddenly gives way, or buckles, without warning. This instability is usually accompanied by pain and swelling. In some cases, the knee may feel like it is popping or clicking when it gives way.

Other signs of an ACL tear include a feeling of the knee being loose or unstable, difficulty bending the knee, and difficulty turning the knee from side to side. In addition, some people may notice a popping or tearing noise when the knee gives way.

If you experience instability in your knee, it is important to seek medical attention as soon as possible. A physician can perform a physical exam and run imaging tests to determine if there is an ACL tear.

5. Loss of Strength

When the ACL is torn, the knee loses stability and can give way suddenly. This can cause pain and swelling, as well as a loss of strength in the affected leg due to the disruption of the normal functioning of the knee joint. A torn ACL can make it difficult to perform daily activities such as walking, running, and jumping, as well as more strenuous activities such as sports or weightlifting.

The loss of strength in the affected leg can be noticeable right away, or it can take several weeks to become apparent. When it does become noticeable, it can be a sign that the ACL injury is serious and requires medical attention.


If you suspect that you may have symptoms of a torn ACL, it’s important to seek medical attention right away. A doctor can perform a physical exam and order diagnostic tests such as an X-ray or MRI to confirm the diagnosis. Treatment for a torn ACL may include physical therapy, medications, braces, and in some cases, surgery.

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