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Knee Injuries: Symptoms, Causes, and When 2 Seek Help

Knee Injuries Come in All Shapes, Forms, and Sizes

The knee is one of the most complex and hardworking joints in the body — and one of the most commonly injured. From athletes and weekend warriors to active adults, knee injuries can happen to anyone. But understanding the source of your symptoms is the first step toward proper recovery and long-term health.

Knee pain can vary greatly depending on the type and location of the injury. Ask yourself:

  • Is the pain sharp and intense, or dull and achy?
  • Did it start suddenly during an event or build gradually over time?
  • Does it sit in the front, back, inside, or outside of your knee — or feel deep within the joint?

These details can help your healthcare provider or physical therapist determine whether your injury involves bone, muscle, tendon, ligament, or cartilage — and how to best treat it.

Common Symptoms to Watch For

In addition to pain, swelling is a key indicator of knee injury. Swelling may occur inside the joint (making it feel stiff and full) or around the outside structures (making the knee visibly larger than the other).

This inflammation often limits range of motion — your ability to bend (flex) and straighten (extend) the knee. Without full mobility, daily activities like walking, squatting, or going up stairs can quickly become uncomfortable or even impossible.

You may also notice weakness or instability, as pain and swelling make it difficult for your muscles to properly support the joint. If your knee feels like it’s “giving out” or buckling, that’s a red flag that the supporting structures need evaluation.

When to Seek Professional Help

It’s important to know when your symptoms require a professional’s eye. You should seek care from a physician, orthopedic specialist, or physical therapist if you experience any of the following:

  • Severe or persistent pain that doesn’t improve with rest or over-the-counter treatment.
  • Inability to bear weight or walk without significant discomfort.
  • Catching or locking sensations, or an inability to fully bend or straighten the knee.
  • Instability or repeated “giving way” of the joint.

If your injury involved a major fall, collision, or twist — or you simply feel unsure about the severity — don’t hesitate to schedule an evaluation. Early diagnosis and intervention can prevent minor injuries from becoming long-term issues.

Building a Stronger, More Resilient Knee

While not all knee injuries can be prevented, there are many ways to reduce your risk. Regular flexibility, mobility, and strength training are essential. Physical therapists often assess key areas such as:

  • Ankle and hip mobility: Limited movement at these joints can increase knee stress.
  • Quadriceps and hamstring strength: Both play vital roles in stabilizing and protecting the knee.
  • Balance and control: Tests like the Y-Balance or single-leg step-down reveal weaknesses that can lead to injury.

Functional tests — such as a 12-minute run for endurance or a 300-yard shuttle for power — help gauge overall fitness and readiness for activity. Combined with proper warm-ups and gradual training loads, these strategies put your knees in a better position to perform and stay healthy.

The Bottom Line

Whether you’re recovering from an injury or hoping to stay ahead of one, understanding your body’s signals is key. Knee pain, swelling, or instability aren’t conditions to ignore — they’re messages that something needs attention.

Working with a physical therapist can help restore your mobility, rebuild strength, and get you back to doing what you love safely and confidently.

Ready to seek help for your knee issues? We are here to serve you – Schedule Here

About Rehab 2 Perform

Rehab 2 Perform is a leading physical therapy and sports rehabilitation company dedicated to helping clients achieve optimal performance in their daily lives, whether they are athletes, weekend warriors, or individuals recovering from injury. With a team of highly skilled professionals, Rehab 2 Perform offers a personalized, evidence-based approach that emphasizes active rehabilitation and functional fitness. Find a Location near you.

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