Knee Pain
Free Symptom Checker
with Physician-supervised AI
Reviewed By:
Kent C Doan, MD (Orthopedics)
Dr Doan Graduated from the University of Missouri Kansas City School of Medicine and completed residency training in Orthopedic Surgery at the University of Colorado. He completed additional fellowship training in Orthopedic Sports Medicine at the prestigious Steadman Clinic and Steadman Philippon Research Institute in Vail, Colorado. He is a practicing Orthopedic Surgeon who specializes in complex and revision knee and shoulder surgery at the Kansas City Orthopedic Institute. He also holds an assistant professorship at the University of Kansas City.
Tomohiro Hamahata, MD (Orthopedics)
Dr. Hamahata graduated from the Jikei University of Medical Science. After working at Asanokawa General Hospital and Kosei Chuo Hospital, he joined the Department of Orthopedics at Asakusa Hospital in April 2021, specializing in general orthopedics and joint replacement surgery.
Content updated on Jan 29, 2025
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Try one of these related symptoms.
Have knee pain
Pain behind the knee
Knee swelling
Knee pain when crouching
Knee pain with numbness or tingling in the same leg
Pain when I press the knee
Inner knee pain
Knee injury
Aching in the knee cap
Painful knee when going down stairs
Knee region burning sensation
Unable to put pressure on the knees
How Ubie Can Help You
With a free 3-min Knee Pain quiz, powered by Ubie's AI and doctors, find possible causes of your symptoms.
This questionnaire is customized to your situation and symptoms, including the following personal information:
Biological Sex - helps us provide relevant suggestions for male vs. female conditions.
Age - adjusts our guidance based on any age-related health factors.
History - considers past illnesses, surgeries, family history, and lifestyle choices.
Your symptoms
Our AI
Your report
Your personal report will tell you
✔ When to see a doctor
✔︎ What causes your symptoms
✔︎ Treatment information etc.
People with similar symptoms also use Ubie's symptom checker to find possible causes
- My knees don't bend due to both pains
- Starting to walk causes knee pain, but it goes away with more walking
- Need some help getting up from a chair because the knees hurt
- Knee is swollen and the skin is red and hurts
- Red, painful skin over the knee with swelling
- Feeling pain when pressing around the knee
- Can't squat properly because of knee pain
- Stinging or tingling around the knee
- Knee pain with swelling and redness
- Feel tight in the back of the knee
- Outer side of the knee hurts
- Knee aches on the inner side
- Pain in both knees
- Knee does not bend due to left pain
- Knee hurts when I start walking, then gets better as I walk more
See full list
Just 3 minutes.
Developed by doctors.
Try Free Symptom QuizAbout the Symptom
Knee pain can be throughout the joint, in the front, back, either or both sides. The pain may be pressing, sharp or dull in nature.
When to See a Doctor
Seek professional care if you experience any of the following symptoms
- Violaceous / purpuric rash
- Easy bruising
- Vomiting of blood
- Melena (black stools)
- Recent weight loss
- Numbness / sensory disorder
Possible Causes
Generally, Knee pain can be related to:
- Osteoarthritis (OA)
Wear and tear of the joint cartilage over time. Risk factors include repetitive joint movements and carrying heavy loads for many years.
- Rheumatoid Arthritis (RA)
A chronic inflammatory disease where the body's immune system attacks multiple joints, most commonly in the hands and feet. The cause and trigger is unknown.
- Gout / Pseudogout
Gout and pseudogout are diseases caused by inflammation and crystal accumulation in the joints. Gout results from uric acid crystals, while pseudogout stems from calcium pyrophosphate crystals. Both are marked by sudden, painful swelling in one or more joints. Gout attacks can be triggered by eating purine-rich foods like seafood, alcohol, and red meat, while pseudogout may be due to joint injury, surgery, or immune issues.
- Osteonecrosis
- Lumbar Vertebrae Disk Herniation
- Lumbar Spondylosis
- Osteoporosis
Hypophosphatasia (HPP)
Related Serious Diseases
Sometimes, Knee pain may be related to these serious diseases:
- Septic Arthritis
Septic arthritis is an infection of a joint space. This can be caused by a wound that penetrates the joint allowing bacteria to enter, complications following surgery, or by bacteria traveling from distant sites via the bloodstream into the joint.
- Decompression Sickness
Doctor's Diagnostic Questions
Your doctor may ask these questions to check for this symptom:
- Are you experiencing knee pain?
- Do you have pain when pressing around the knee?
- Do you have pain behind your knees?
- When did you first notice your knee pain?
- On a scale of 1 to 10, how severe was your knee pain at its worst?
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Developed by doctors.
Try Free Symptom QuizFAQs
Q.
What Could Be the Causes of Knee Pain When Bending?
A.
Knee pain when bending can be caused by various factors, including injuries, degenerative conditions, and structural abnormalities. Identifying the specific cause is essential for effective treatment and management.
References:
Kuwabara A, Fredericson M. Narrative: Review of Anterior Knee Pain Differential Diagnosis (Other than Patellofemoral Pain). Curr Rev Musculoskelet Med. 2021 Jun;14(3):232-238. doi: 10.1007/s12178-021-09704-9. Epub 2021 Apr 5. PMID: 33818700; PMCID: PMC8137785.
Calmbach WL, Hutchens M. Evaluation of patients presenting with knee pain: Part II. Differential diagnosis. Am Fam Physician. 2003 Sep 1;68(5):917-22. PMID: 13678140.
Duong V, Oo WM, Ding C, Culvenor AG, Hunter DJ. Evaluation and Treatment of Knee Pain: A Review. JAMA. 2023 Oct 24;330(16):1568-1580. doi: 10.1001/jama.2023.19675. PMID: 37874571.
Atanda A Jr, Ruiz D, Dodson CC, Frederick RW. Approach to the active patient with chronic anterior knee pain. Phys Sportsmed. 2012 Feb;40(1):41-50. doi: 10.3810/psm.2012.02.1950. PMID: 22508250.
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References
NHS
https://www.nhs.uk/conditions/knee-pain/Journal of the American Academy of Orthopaedic Surgeons ():10.5435/JAAOS-D-23-00342, August 21, 2023. | DOI: 10.5435/JAAOS-D-23-00342
Reviewed By:
Kent C Doan, MD (Orthopedics)
Dr Doan Graduated from the University of Missouri Kansas City School of Medicine and completed residency training in Orthopedic Surgery at the University of Colorado. He completed additional fellowship training in Orthopedic Sports Medicine at the prestigious Steadman Clinic and Steadman Philippon Research Institute in Vail, Colorado. He is a practicing Orthopedic Surgeon who specializes in complex and revision knee and shoulder surgery at the Kansas City Orthopedic Institute. He also holds an assistant professorship at the University of Kansas City.
Tomohiro Hamahata, MD (Orthopedics)
Dr. Hamahata graduated from the Jikei University of Medical Science. After working at Asanokawa General Hospital and Kosei Chuo Hospital, he joined the Department of Orthopedics at Asakusa Hospital in April 2021, specializing in general orthopedics and joint replacement surgery.
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Link to full study:
https://www.medrxiv.org/content/10.1101/2024.08.29.24312810v1