Here are the possible conditions based on your answers:
Hamstring Tears
Hamstring injuries are the most commonly reported injuries among athletes. Hamstring injuries can occur close to the hip, in the middle of the hamstring, or behind the knee. Hamstring tears can range from mild to complete
Read MorePosterior Cruciate Ligament (PCL) Tears
The posterior cruciate ligament (PCL) is a strong ligament that runs through the center of the knee joint and connects the femur (thigh bone) to the tibia (shin bone). The PCL keeps the shinbone from moving backward after the leg has been straightened. Generally, when a PCL tear occurs, it is partial, meaning that the tear does not go all the way through the ligament. Occasionally, the tear will go completely through the ligament. Partial tears are able to heal on their own, while complete tears may need surgical repair.
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?
Back
How did you hurt it?
Fell directly on it or Hyperextended or Landing after jump
Is it swollen?
Yes

Do you need to see a doctor?
Find out