Here are the possible conditions based on your answers:
Lateral Meniscus Tears
The meniscus is a wedge-shaped cushion made of cartilage that sits between the two bones that make up the knee: the femur (thigh bone) and the tibia (shin bone). The meniscus serves as a shock absorber and provides stability to the knee. The lateral meniscus is located on the lateral or outer part of the knee. The most common tears are radial, bucket-handle, and flap tears. Meniscus tears range from small tears to larger ones.
Read MorePatella Dislocation
Your kneecap, or patella, connects muscles in your thigh (femur) to your shinbone (tibia). When your knee bends, it slides along a groove (femoral groove) at the end of your thigh bone. Patella instability is a condition that occurs when the kneecap comes out of this groove. When this happens, it can result in pain, difficulty walking, and other problems. When the kneecap comes out of the groove a little, but not completely, it is called subluxated. When it moves completely out of the groove, it is dislocated.
Read MoreAnterior Cruciate Ligament (ACL) Tear
The anterior cruciate ligament (ACL) is one of the four major ligaments in the knee. It runs through the middle of the knee and connects the thigh to the shin, giving stability to the knee joint. It provides the primary restraint to the femur (thigh bone) moving on the tibia (shin bone). It also provides stability by helping to control excessive rotation of the knee. Anterior cruciate ligament tears, or ACL tears, are one of the most common knee injuries for athletes. ACL tears often occur in sports that require a lot of agility, or “cutting,” where an athlete suddenly changes directions while moving quickly
Read MoreDoesn't seem right? Edit your answers
This is not a medical diagnosis. Always consult your physician. If you are in extreme pain, please dial 911 or go to emergency.
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Who are our Medical Experts?
Upswing is led by two orthopedic surgeons with over 50 combined years of healthcare leadership and experience.

- Dr. Jay Kimmel is an orthopedic surgeon with Advanced Orthopedics New England. Dr. Kimmel specializes in Sports Medicine with an emphasis on shoulder and knee injuries.
- Assistant clinical professor in both the department of family medicine and department of orthopedics at the University of Connecticut.
- Dr. Kimmel is a fellow of the American Academy of Orthopedic Surgery and is board-certified in Orthopedic Surgery.
- Sport of Choice: Tennis
Dr. Jay Kimmel

- Dr. Steve Schutzer is a Founding Member and Medical Director of the Connecticut Joint Replacement Institute at Saint Francis Hospital and Medical Center,
- President of the Connecticut Joint Replacement Surgeons, LLC and Physician Executive for the Orthopedic Service Line at Trinity Health Of New England.
- Highly sought-after national speaker on value-based healthcare.
- Sport of Choice: Tae Kwon Do
Dr. Steven Schutzer
We suggested this condition because you mentioned these symptoms:
This is not a medical diagnosis. If you are in extreme pain, please dial 911 or go to emergency.
Where does it hurt?
Knee
In what area does it hurt?
Outside
Is it worse with activity?
Yes
How did you hurt it?
Fell directly on it or Twisted it or Hit from outside or Hit from inside or Hyperextended or Landing after jump
Is it swollen?
Yes
How soon after injury did it swell?
First six hours
Did you feel a pop?
Yes

Do you need to see a doctor?
Find out