Understanding Ankle Sprains

An ankle sprain occurs when one or more ligaments that stabilize the ankle joint are stretched or torn. Understanding ankle anatomy is important for diagnosing and treating ankle sprains. The key ligaments involved are the anterior talofibular ligament (ATFL), calcaneofibular ligament (CFL) and posterior talofibular ligament (PTFL).

This injury typically happens when the foot rolls, twists or turns beyond its normal range of motion. Most ankle sprains involve the ligaments on the outside of the ankle, with the ATFL being the most injured ligament during a lateral ankle sprain. The CFL is stronger and larger than the ATFL and runs obliquely, while the PTFL is thick and strong and is rarely injured during ankle sprains. High ankle sprains and medial ligament injuries can also occur.

Common Causes of Recurrent Ankle Sprains

• Sudden twisting or rolling of the foot, often due to a severe inversion injury that can lead to significant ligament damage
• Uneven walking or running surfaces
• Sports-related movements such as jumping, cutting or pivoting
• Falls or missteps during daily activities
• Wearing unsupportive or unstable footwear

Symptoms of an Ankle Sprain

• Pain and tenderness around the ankle
• Swelling and bruising
• Limited range of motion
• Difficulty bearing weight
• A feeling of instability or weakness

Grades of Ankle Sprains

Ankle sprains are commonly classified by severity:

• Grade I (Mild): Ligaments are stretched but not torn, with minimal swelling and discomfort.
• Grade II (Moderate): Partial ligament tearing with increased pain, swelling and limited mobility.
• Grade III (Severe): Complete ligament rupture, also known as a torn ligament, with significant swelling, bruising and joint instability.

Proper diagnosis is essential to determine the severity of the injury and guide treatment.

What Is Chronic Ankle Instability?

Chronic ankle instability develops when the ankle repeatedly gives way following one or more sprains. About 20% of patients with an acute ankle sprain develop chronic ankle instability, and studies suggest it may affect 20% to 40% of individuals who experience an ankle sprain. A history of previous ankle injuries increases the risk of developing chronic ankle instability.

This condition often results from incomplete healing, inadequate rehabilitation or recurrent injuries. Over time, repeated instability can lead to cartilage damage, tendon injuries and early arthritis.

Signs of Ankle Instability

• Recurrent ankle sprains
• Persistent swelling or discomfort
• Ongoing ankle weakness
• A sensation of the ankle giving out
• Difficulty with uneven surfaces or athletic activities

Patients with chronic ankle instability often report a history of recurrent ankle sprains.

Associated Conditions

Chronic ankle instability is rarely an isolated problem and often occurs alongside other conditions that can complicate diagnosis and treatment. Some patients may develop complex regional pain syndrome, which is characterized by persistent pain and sensitivity in the affected area. Sinus tarsi syndrome may also accompany chronic ankle instability, causing pain and tenderness on the outside of the ankle.

Tendon disorders, such as peroneal tendinopathy, can lead to pain and weakness along the outer ankle. Injuries to the lateral talar process or fractures of the anterior calcaneal process and fibula may further destabilize the ankle joint. In some cases, loose bodies within the joint or osteochondral lesions of the talar dome or distal tibia may be present, contributing to pain and limited mobility.

Recognizing these associated conditions is essential for a comprehensive approach to treating chronic ankle instability.

How OrthoTexas Diagnoses Ankle Sprains and Instability

Accurate diagnosis is the foundation of effective treatment. Our specialists perform a thorough evaluation that may include:

• Detailed medical history and physical examination
• Assessment of ankle strength, stability and range of motion, including evaluation for ligament laxity
• Imaging studies such as X-rays or MRI to evaluate ligament damage, cartilage injuries or associated fractures

Identifying injured ligaments is crucial for determining the appropriate treatment plan.

Non-Surgical Treatment Options

Conservative, non-surgical treatments are always the first option for managing ankle sprains and chronic ankle instability.

Most ankle sprains and many cases of ankle instability respond well to conservative care. Treatment plans are customized based on injury severity and patient activity level. Bracing, including the use of an ankle brace, may be recommended full time or during high-impact activities.

Conservative Care and Physical Therapy

• RICE therapy: Rest, ice, compression and elevation
• Bracing or immobilization: To support healing and prevent further injury
• Medications: Anti-inflammatory medications to reduce pain and swelling
• Physical therapy: Strengthening, balance training and proprioception exercises to restore stability. Neuromuscular and proprioceptive training are key components of rehabilitation and help improve balance, functional capacity and joint awareness after injury.
• Custom orthotics: To improve foot alignment and reduce stress on the ankle

Proper rehabilitation is critical to preventing recurrent injuries and long-term instability.

Ankle Instability Exercises

A targeted exercise program is a cornerstone of rehabilitation for chronic ankle instability. Physical therapy includes exercises designed to restore ankle stability, improve strength and enhance proprioception, which is the body’s ability to sense joint position and movement.

Common exercises include single-leg balance drills, heel-to-toe walking, ankle circles and resistance band strengthening. Working with a physical therapist or foot and ankle specialist ensures that the exercise program is tailored to individual needs and recovery goals.

MLS Laser Treatment

MLS laser treatment is a noninvasive therapy option that may be used to support recovery in patients with chronic ankle instability. This treatment uses multiwave locked system laser technology to help reduce inflammation, improve circulation and promote tissue healing.

By decreasing pain and swelling, MLS laser therapy may enhance the effectiveness of physical therapy and bracing as part of a comprehensive care plan.

When Surgery May Be Recommended

Surgery may be considered when conservative treatment fails to restore stability or when significant ligament damage is present. Surgical options are selected based on the patient’s condition, activity level and treatment goals.

Surgical procedures for chronic ankle instability may include anatomical ligament repair, ligament reconstruction or tendon augmentation. The Bröstrom procedure and Bröstrom-Gould repair are commonly used techniques for repairing damaged lateral ankle ligaments. In certain cases, anatomic ligament reconstruction or arthroscopic procedures may be used to address associated cartilage damage.

Surgical Treatments

• Lateral ankle ligament repair or reconstruction
• Arthroscopic procedures to address cartilage damage
• Tendon repair when associated injuries are present

Minimally invasive techniques are used whenever appropriate to support optimal recovery.

Recovery and Prevention

Recovery time varies depending on injury severity and treatment approach. Many patients return to daily activities within weeks, while athletes or surgical patients may require longer rehabilitation.

Chronic ankle instability may cause ongoing swelling, muscle weakness, decreased proprioception and difficulty with activities such as jumping, landing or walking on uneven surfaces. Fear of movement is also common in patients with ongoing instability.

Preventing Future Ankle Injuries

• Complete a full rehabilitation program after an ankle sprain
• Wear supportive footwear during activities
• Use ankle braces if recommended
• Maintain strength and flexibility in the foot and ankle
• Avoid uneven surfaces when possible

Expert Ankle Care at OrthoTexas

Ankle sprains and instability should never be ignored, as untreated injuries can lead to chronic pain and mobility limitations. The foot and ankle specialists at OrthoTexas offer advanced diagnostic tools and a full spectrum of non-surgical and surgical treatments to help patients regain stability and confidence in their movement.