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what causes fluid behind the knee

A 55-year-old female asked:
Dr. Oscar Novick
57 years experience Pediatrics
Popliteal cyst: You may have a popliteal or baker's cyst behind your knee it is benign and it contains synovial fluid.

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A female asked:
Dr. Mary Engrav
30 years experience Emergency Medicine
I : I am so happy that you are doing better. It sounds like you have been doing all of the right things, including going to the gym and performing exerci ... Read More
A 43-year-old female asked:
Dr. Ahmad Ibrahim
18 years experience Urgent Care
Get checked: Without a proper exam of the rash it would be difficult to give the best answer. Consider sending us a picture
A 42-year-old member asked:
Dr. Mark Sacher
32 years experience Pain Management
Joint efussion: You have a joint efussion. There are many reasons for a joint efussion. First the joint fliud has to be drained and sent out for lab diagnosis. It can ... Read More
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A 38-year-old member asked:
Dr. Amir Khan
Dr. Amir Khan answered
26 years experience Sports Medicine
Many reasons: There could be many reasons for bruising behind the knee. Injury such as a contusion to the area, a ruptured popliteal cyst may manifest itself in the ... Read More
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A 30-year-old member asked:
Dr. Bertrand Kaper
28 years experience Orthopedic Reconstructive Surgery
Baker's cyst: Localized swelling behind the knee is typically a baker's cyst or popliteal cyst. These cysts can arise if there is fluid within the knee joint. To ... Read More
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A member asked:
Dr. Philip Chao
37 years experience Radiology
Not sure: Sounds innocuous. But if you get it often ask your family doc.
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A 44-year-old male asked:
Dr. Katharine Cox
44 years experience Pediatric Emergency Medicine
At nights: Generally if the pain is at nights only and there is no swelling or redness present, it gets referred to as "growing pains". This diagnosis would only ... Read More
A 20-year-old female asked:
Dr. Warren Everett
Specializes in Family Medicine
Indeterminate: The knee has ligaments, bone, and cartilege. Exactly which one is a problem can be diffucult to tell. Osgood-Slatters in youth is the most common an ... Read More
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A 40-year-old male asked:
Dr. Cesar Sturla
34 years experience Internal Medicine
Variety of possibili: It could be arthritis, phlebitis, baker cyst, deep vein thrombosis. If you are concern make an appt with a Dr.
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1 thank

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