Why Is One Knee Swollen but Not the Other?
Noticing that only one knee is swollen can be alarming—especially when the other knee feels perfectly fine. While swelling in both knees often points to systemic issues like arthritis, swelling in just one knee usually indicates a localized problem. Understanding the potential causes behind unilateral knee swelling can help you decide whether it’s something minor or a sign you need medical attention.
1. Injury or Trauma

The most common reason for swelling in just one knee is trauma or overuse. You may not even remember the specific moment of injury—especially if it was a repetitive motion injury. Some possible issues include:
- Ligament sprain or tear (ACL, MCL)
- Meniscus tear
- Patellar dislocation
- Fracture or bone bruise
In these cases, swelling often appears within hours and may be accompanied by pain, stiffness, or a feeling of instability in the joint.
2. Bursitis
CONTINUE READING ON THE NEXT PAGE 🥰💕
Grandma`s Fluffy Apple Pie Recipe
Don’t Buy Tangerines Again – Learn How to Grow Them at Home!
How To Make Chicken Parmesan Casserole
5 Early Signs of Cancer Growing in the Body
Comtoise Feuillantine with Comté and Ham
This is What Happens if You Burn a Bay Leaf in Your Home
Your Fingers Could Reveal Whether You’re Rich or Poor
I Understood Why Women Over 50 Look Older After Applying Lipstick: 2 Strokes That Will Fix the Situation
Garlic Butter Lobster & Scallops