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Pain Behind the Knee: Baker’s Cyst, Meniscus or Arthritis?
Updated: 2 days ago
Quick answer: A Baker’s cyst is a fluid-filled expansion behind the knee that often develops because the joint is producing extra fluid from arthritis or irritation.
Posterior knee pain can come from several structures. A Baker’s cyst is a fluid-filled expansion behind the knee that often develops because the joint is producing extra fluid from arthritis or irritation. Meniscus tears, hamstring or calf tendon problems and less common vascular or nerve conditions can also cause pain here.
Baker’s cyst clues
A Baker’s cyst may create fullness or tightness behind the knee, especially with bending or straightening. The cyst itself is often a sign of an underlying knee problem rather than the primary disease, so treating only the cyst can lead to recurrence.
Meniscus and arthritis
A degenerative meniscus tear may cause joint-line pain, swelling, clicking or symptoms after twisting. Arthritis can create aching, stiffness and recurrent fluid. These problems often overlap.
Diagnosis and treatment
A focused exam, X-ray and ultrasound can answer many important questions. Management may include activity modification, therapy, arthritis treatment and, in selected cases, ultrasound-guided aspiration. Sudden calf swelling, redness, shortness of breath or severe pain needs prompt evaluation.
When to seek care
Persistent pain, progressive weakness, recurrent swelling, locking, inability to bear weight after an injury, or symptoms that limit sleep and daily activity deserve medical evaluation. Treatment is most effective when it is based on a clear diagnosis rather than simply the location of pain.
Related care: Baker’s cyst treatment
Carolina Nonsurgical Orthopedics provides physician-led evaluation and nonsurgical treatment for musculoskeletal conditions in Raleigh and Cary, North Carolina. This article is for general education and is not a substitute for an individual medical evaluation.
Related orthopedic resources
About Your Physicians
Dr. Matthew Kanaan
Nonsurgical Orthopedic Specialist
Founder of Carolina Nonsurgical Orthopedics. Fellowship trained in sports medicine at Duke; residency in family medicine at Duke, where he served as Chief Resident.
Dr. Pierce Knox
Nonsurgical Orthopedic Specialist
Fellowship trained in nonsurgical sports medicine at Penn Medicine; residency in primary care at Christiana Care.
