Educational Resource
Why Does My Knee Hurt?
Knee pain is one of the most common musculoskeletal complaints affecting adults of all ages. Symptoms may develop gradually over time or appear suddenly after an injury. This educational resource explains common causes of knee pain, evaluation pathways, treatment options, and situations where further orthopedic assessment may be appropriate.
Educational content only. Not medical advice. Individual evaluation is required. Results vary.
Why knee pain occurs
Understanding Knee Pain
The knee is one of the largest and most complex joints in the body. It is responsible for supporting body weight while allowing walking, running, climbing, kneeling, and many daily activities. Pain can originate from cartilage, ligaments, tendons, muscles, bone, inflammation, arthritis, injury, or surrounding structures. The exact cause cannot be determined without appropriate evaluation.
Common causes
Common Causes Of Knee Pain
Knee Osteoarthritis
Gradual cartilage wear may lead to pain, stiffness, swelling, and reduced mobility.
Meniscus Tears
The meniscus acts as a shock absorber inside the knee and may become damaged through injury or degeneration.
Ligament Injuries
ACL, PCL, MCL, and LCL injuries may affect stability and function.
Patellofemoral Pain Syndrome
Pain around the kneecap often associated with activity, stairs, or prolonged sitting.
Tendon Disorders
Inflammation or degeneration of tendons may contribute to pain.
Sports Injuries
Athletic activities can lead to cartilage, ligament, or soft tissue injuries.
Inflammatory Arthritis
Conditions such as rheumatoid arthritis may affect the knee joint.
Mechanical Alignment Problems
Changes in alignment may increase joint stress and contribute to symptoms.
Evaluation
What Evaluation May Include
Evaluation recommendations vary based on symptoms, medical history, age, activity level, and physical examination findings.
Medical History Review
Physical Examination
Weight-Bearing X-Rays
MRI Evaluation
Laboratory Testing
Functional Assessment
Prior Surgical Review
Gait Analysis
Not all patients require every test. Evaluation should be individualized.
Treatment pathways
Possible Treatment Pathways
Treatment depends on the underlying cause of symptoms. Many patients improve without surgery.
Activity Modification
Physical Therapy
Weight Management
Medication Optimization
Joint Injections
Biologic Therapies
Arthroscopy
Knee Replacement Surgery
Treatment decisions should be individualized and discussed with qualified healthcare professionals.
When to seek evaluation
When Should Knee Pain Be Evaluated?
- Pain lasting more than several weeks
- Difficulty walking
- Persistent swelling
- Mechanical locking
- Instability
- Night pain
- Reduced mobility
- History of previous knee surgery
- Significant impact on quality of life
Frequently Asked Questions
Educational answers only. Individual evaluation is required. Results vary.
Why does my knee hurt when climbing stairs?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Can arthritis cause knee pain?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
How do I know if I have a meniscus tear?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Do I need an MRI?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Can knee pain improve without surgery?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
What treatments are available?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
When is knee replacement considered?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Can weight loss improve symptoms?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
How long does recovery take?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Are outcomes guaranteed?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
When should I seek urgent care for knee pain?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Can knee injections help?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Is physical therapy effective?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
What is patellofemoral pain syndrome?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
What is a meniscus tear?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Are ligament injuries always surgical?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
What is the role of imaging?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
When is arthroscopy considered?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
How is knee instability evaluated?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Can knee pain be referred from the hip or spine?
This is educational information only. Treatment depends on diagnosis. Individual evaluation by a qualified orthopedic specialist is required. Outcomes vary and are not guaranteed.
Financial planning
Understanding Treatment Costs & Financing
Patients frequently explore financing options while researching orthopedic treatment pathways. Financing availability varies by provider and region. Terms, approval, rates, and availability are determined by independent third-party providers.
Explore Financing OptionsScience & evidence
Evidence-Based Orthopedic Education
This educational resource references information from:
Medical Review
Medical Review
This educational content has been medically reviewed for accuracy and completeness.
Reviewed by
Dr. Aureliano Mateus García, MD
Board Certified Orthopedic Surgeon · Joint Reconstruction · Hip & Knee Replacement · Arthroscopy · Sports Medicine
Dr. Aureliano Mateus García is an orthopedic surgeon specializing in joint reconstruction, arthroscopy, sports medicine, and hip and knee replacement surgery. His clinical practice focuses on patients with degenerative joint disease, sports-related injuries, meniscal pathology, ligament injuries, hip disorders, and advanced arthritis requiring joint replacement. Dr. Mateus combines minimally invasive orthopedic techniques with evidence-based treatment pathways designed to improve mobility, reduce pain, and accelerate recovery whenever possible.
Areas of Interest
- Knee Replacement Surgery
- Hip Replacement Surgery
- Revision Joint Surgery
- Knee Arthroscopy
- Hip Arthroscopy
- ACL Reconstruction
The purpose of this review is to ensure educational accuracy and consistency with current orthopedic literature and professional society recommendations. Medical review does not create a physician-patient relationship.
Last Reviewed: June 2026
Facility Information
Hospital CYNTAR
Orthopedic procedures discussed on this website may be performed at Hospital CYNTAR in Tijuana, Mexico. Hospital CYNTAR is a multidisciplinary specialty hospital serving domestic and international patients, and is part of the same institutional group as Obesity Control Center and The Ariel Center for Cosmetic Surgery.
Advanced orthopedic surgery suites
On-site ICU with 24/7 patient monitoring
Digital imaging services (X-ray, CT, MRI on-site or coordinated)
Arthroscopy equipment
Joint replacement technology
Physical therapy and rehabilitation resources
Dedicated US patient coordinators and translators
20+ years of specialty surgical experience at the same facility
Short flight to San Diego with coordinated border transfer
Perioperative care teams
Availability of specific technologies, services, and physicians may vary.
Institutional Track Record
Host Facility — Verified Surgical Track Record
Hospital CYNTAR is part of an institutional group with a long-standing international surgical track record. The metrics below reflect the affiliated bariatric surgery program at Obesity Control Center operating within the same hospital group — they demonstrate institutional volume, accreditation, and safety culture, and are not orthopedic outcomes.
30,000+
Procedures performed (bariatric program)
19,801
Patients in ASMBS published outcomes study
1.2%
30-day morbidity (published series)
0
Mortalities reported (published series)
2010
SRC Center of Excellence since
These metrics describe the host facility's bariatric program (Obesity Control Center) and demonstrate institutional safety culture. They do not represent outcomes for hip or knee surgery. Individual orthopedic results vary.
Hospital Standards & Accreditation
Hospital Standards & Accreditation
When evaluating orthopedic treatment programs, patients often review facility accreditation, safety protocols, infection prevention programs, quality reporting, and rehabilitation support. Hospital CYNTAR is Joint Commission International (JCI) accredited — the gold standard for international hospital quality and patient safety — and the same institutional group additionally holds SRC Center of Excellence and Global Healthcare Accreditation designations through its affiliated bariatric program at Obesity Control Center.
Hospital CYNTAR's JCI accreditation can be independently verified using the link above. SRC Center of Excellence and Global Healthcare Accreditation are held by the affiliated Obesity Control Center program operating within the same hospital group.
Speak With An Educational Coordinator
Educational coordinators can help explain pathways and answer general questions. This is not medical advice.
Placeholder contact details — update in site-config before launch.
Request Educational Information
Educational information only. No diagnosis or treatment recommendation is provided through this form. Results vary. Submitting does not create a doctor-patient relationship.