Knee Pain When Climbing Stairs: Causes and Clinical Approach

Primary Cause: Patellofemoral Pain Syndrome

The American College of Sports Medicine suggests that patellofemoral pain syndrome (PFPS) is the most common cause of knee pain during stair climbing, characterized by retropatellar or peripatellar pain that occurs when load is placed on the knee extensor mechanism during activities requiring knee flexion under load, such as climbing stairs, squatting, or sitting with flexed knees 1
Pain localizes behind or around the kneecap and worsens with activities that load a flexed knee, according to the British Journal of Sports Medicine 1

Anterior knee pain during stairs strongly suggests patellofemoral disorders, including cartilage loss, subluxation/dislocation, friction syndrome, patellar tendinopathy, or fat pad impingement, as stated by Praxis Medical Insights 2
Medial knee pain during stairs points toward medial compartment osteoarthritis or subchondral insufficiency fractures, particularly in middle-aged to elderly females, according to Praxis Medical Insights 2
Lateral knee pain suggests iliotibial band syndrome or lateral compartment osteoarthritis, as noted by Praxis Medical Insights 2
Hip pathology commonly refers pain to the knee and must be evaluated if knee imaging is normal, as recommended by Praxis Medical Insights 2, 3
Lumbar spine pathology must be considered when knee radiographs are unremarkable and clinical evidence suggests spinal origin, according to Praxis Medical Insights 2, 3

Physical examination in OA patients routinely reveals knee effusions, as reported by Praxis Medical Insights 4
Synovitis/effusion severity changes are significantly related to the risk of frequent knee pain, according to Praxis Medical Insights 4
Both bone marrow lesions and synovitis/effusion may indicate the origin of knee pain in osteoarthritis patients, as stated by Praxis Medical Insights 4

Kneeling, squatting, and bending show strong evidence for increased risk of developing knee OA in both men and women, as found by Arthritis Care & Research 5
Heavy physical demands demonstrate strong evidence for increased knee OA risk, according to Arthritis Care & Research 5
Climbing stairs or ladders shows strong evidence for NO increased risk of knee OA, which distinguishes stair climbing as a pain-provoking activity in existing pathology rather than a causative factor, as reported by Arthritis Care & Research 5

Obtain anteroposterior and lateral knee radiographs first to exclude fractures, osteoarthritis, osteophytes, and loose bodies, as recommended by Praxis Medical Insights 2, 3
Assess for knee effusion on physical examination, as presence guides treatment approach, according to Praxis Medical Insights 4
Evaluate hip and lumbar spine clinically before attributing symptoms solely to knee pathology, as stated by Praxis Medical Insights 2, 3

Individualized knee-targeted exercise therapy (±hip) should be delivered following assessment of symptom severity and irritability, as recommended by the British Journal of Sports Medicine 1
Prefabricated foot orthoses should be prescribed when patients respond favorably to treatment direction tests, according to the British Journal of Sports Medicine 1
Education should underpin all interventions, providing rationale for treatment and building confidence, as stated by the British Journal of Sports Medicine 1
Taping may be used as an adjunct to exercise delivery, as noted by the British Journal of Sports Medicine 1

Patellofemoral pain syndrome (PFPS) is defined as retropatellar or peripatellar pain that worsens with activities requiring knee flexion under load, such as stair climbing and running, according to the British Journal of Sports Medicine 6
PFPS accounts for 11-17% of all knee pain presentations in primary care, making it a common cause of knee pain during stair climbing 6

Patients aged 45-55 years with knee pain but normal radiographs can have elevated T2 mapping values on MRI indicating early cartilage changes that still present clinically as PFPS, as noted by the American College of Radiology 7
Early patellofemoral osteoarthritis may present identically to PFPS, even in older patients, and should be considered in the differential diagnosis, according to the American College of Radiology 7

MRI is not initially indicated unless radiographs show abnormalities or symptoms fail to improve with appropriate treatment, as recommended by the American College of Radiology 7