Non-Traumatic Anterior Knee Pain

• Apply cultural awareness and trauma-informed care principles.
• Sociodemographic information: Age, gender, sex, race/ethnicity.
• Main complaint: Location, onset, duration, radiation, frequency, intensity, character, aggravating/relieving factors, associated symptoms.
• Body systems review: Neurologic, cardiovascular, genitourinary, gastrointestinal, muscles and joints, bone density, eyes/ears/nose/throat, respiratory, skin, mental health, reproductive.
• Health, lifestyle, and history: Past medical conditions, medications (including opioids, oral contraception, etc.), supplements, injuries, hospitalizations, surgeries, diet, exercise, sleep habits, smoking, alcohol/substance use, family support, caregiver responsibilities, work/school environment.
• Social determinants of health: mployment, childcare, education, nutrition, housing, domestic violence, child maltreatment, discrimination, social isolation.
• Previous treatments and responses: Document prior treatments, effectiveness and any adverse effects.
• Beliefs and expectations: Assess patient understanding of their condition, treatment goals, and outcome expectations.
• Flag considerations: Identify red, orange, and yellow flags for potential referrals.

​​Outcomes Assessments: Prioritize approaches that align with the patient’s specific goals and clinical presentation.

• Pain: Use pain scales (e.g., AKPS, NRS), pain diagram
• Function and Participation: Evaluate impact of knee pain on daily activities (PSFS, WHODAS 2.0, KOOS, LEFS).
• Recovery: Use Self-rated recovery scales.
• Quality of Life: Assess using tools such as SF-12.
• Work/school Status: Monitor return to activities.
• Sleep quality: Assess using tools such as PSQI.
• Individual Goals: Set SMART goal setting (Specific, Measurable, Achievable, Relevant, Timely).
• Patient Feedback: Gatherand integrate patient experience and satisfaction.

Orange Flags are signs that a mental health or substance use concern may require emergency or timely assessment or shared care, and may change whether and how MSK care proceeds. They are not diagnoses. Ask directly and respectfully when concern arises, considering immediate safety, severity, change from usual, daily functioning and context. Psychosocial factors that may affect recovery but do not require separate mental health or medical assessment are addressed under Yellow Flags.

ACTION: Arrange emergency assessment now when there is immediate danger or an urgent medical need:

• Suicide, self-harm or harm to others: current intent or plan, a recent attempt, inability to stay safe, or behaviour suggesting an immediate risk of serious harm.
• Severe change in mental state: extreme agitation, confusion, disorganization, possible psychosis or mania with impaired judgment or unsafe behaviour, or inability to meet basic needs when this creates immediate danger.
• Substance-related or medical emergency: suspected overdose, severe intoxication, dangerous withdrawal, delirium or another sudden change requiring urgent medical care.

When immediate safety is uncertain, do not leave the person alone while help is arranged. Follow local emergency procedures and call 9-1-1 for immediate danger or urgent medical need. If the person is thinking about suicide, call or text 9-8-8: Suicide Crisis Helpline with them or support them to do so.

If violence, abuse or exploitation is disclosed or suspected, support immediate safety and follow applicable safety and reporting requirements.

ACTION: Arrange prompt medical or mental health assessment when there is:

• Suicide or self-harm thoughts: thoughts without immediate danger.
• Substantial symptoms or effects: severe, persistent or worsening symptoms of depression, anxiety, trauma, possible psychosis or mania, eating problems or substance use that substantially affect daily life, decision-making or safe participation in care.
• Other reasons for assessment: a marked change from usual behaviour or functioning; concern about medication or substance effects; a presentation outside the clinician’s competence; or a request for help.

Agree with the patient on who will be contacted, how soon and what to do if the situation worsens. Confirm that the person has connected with the service when clinically important.

ACTION: Adapt and coordinate MSK care:

• Safe care: care may continue when it is safe and acceptable and does not delay needed assessment. Adapt communication, examination and care; obtain ongoing consent; and coordinate with other providers with the patient’s permission.
• Continue the MSK assessment: do not assume that a mental health or substance use concern explains the MSK presentation. Continue to consider physical causes and the patient’s account.
• Questionnaires: they may support conversation and monitoring, but do not establish a diagnosis or replace direct questions, clinical judgment or action.
• Acceptable support: ask what type of help is acceptable and whether language, cultural, family, community or other supports are important to the patient.

ACTION: Document and follow up:

Record the concern; relevant questions and the patient’s responses; the safety decision and reasons; actions, advice and referrals; communication and consent; follow-up; and any unresolved concern. Follow applicable privacy, safety and reporting requirements.

For provincial, territorial and national services, see Mental health support: Get help (Public Health Agency of Canada 2026).

Yellow Flags are personal, social, work, school, healthcare, environmental or structural factors that may influence symptoms, functioning, participation or response to care. They are contextual, not diagnoses or certain predictions, and do not mean that symptoms are psychological. They guide how care is tailored and do not by themselves require urgent referral. Explore them through conversation and ongoing outcome review, with attention to the patient’s priorities, strengths and circumstances. A separate Yellow Flag score is not required. New or worsening signs of serious physical illness follow the Red Flag process. Mental health or substance use concerns that need separate assessment, or any immediate safety concern, follow the Orange Flag process and applicable emergency or safeguarding procedures.

Explore relevant factors:

• Understanding, expectations and healthcare experiences: concerns about injury or damage, uncertainty, recovery expectations, confidence, conflicting advice, previous dismissal or harm, and trust in care.
• Responses to symptoms and activity: worry, fear, avoidance, cycles of doing too much and then needing prolonged rest, difficulty pacing, coping, sleep, confidence in self-management, and return to meaningful activities.
• Emotional and life context: distress, low mood, anxiety, grief, trauma, caregiving, relationship change, job loss or other major events. Ask permission before sensitive questions and limit discussion to what is relevant and acceptable to the patient.
• Relationships, culture and strengths: supportive relationships, isolation, family and community roles, cultural or spiritual practices, identity, preferences, language and other sources of resilience.
• Work, school and administrative context: physical and psychosocial demands, control, satisfaction, job security, accommodations, return concerns, and compensation, insurance or legal processes. Explore these neutrally and in context.
• Social and structural conditions: consider social and structural determinants of health (Public Health Agency of Canada 2026), including income, housing, food security, transportation, childcare, access and cost of care, discrimination, racism, colonialism, neighbourhood and workplace conditions, and physical or digital accessibility.

ACTION: Respond with the patient:

• Ask, do not assume: use open questions to understand what helps, what gets in the way, what matters and what feels feasible. Ask about strengths and protective factors, not only difficulties. Do not treat a person’s circumstances, culture or choices as a deficit.
• Plan together: integrate relevant findings into shared goals, education, self-management, physical activity or exercise, and participation in meaningful activities. Adapt communication, setting, pace, cost and access where possible.
• Connect and coordinate: with the patient’s consent, consider appropriate clinical, social, workplace, school, community, Indigenous or culturally specific supports. Clarify who will do what and follow up when the connection is important to the plan.
• Review response to care: reassess the patient’s account and the pathway’s selected outcomes at clinically relevant points. If progress differs from expected, review the clinical impression, care plan, access and other barriers; do not automatically attribute the outcome to Yellow Flags.
• Document: record relevant factors and strengths, the patient’s priorities and preferences, agreed actions, consent, referrals or coordination, follow-up, and any change requiring the Orange Flag process.

• Observation: Evaluate colour, patellar position, genu valgum/varum/recurvatum/Q-angle, unilateral asymmetries, edema/effusion, muscle wasting, posture, gait, movements.
• Range of Motion: Assess active, passive, resisted (flexion, extension, internal/external rotation). Assess for pain, limitation/laxity, crepitus.
• Palpation: Examine for superficial: edema/effusion, patella, proximal and distal patellar tendon, bursae, medial and lateral tib-femoral joint line, tibial tuberosity and deep: thigh muscles, pes anserine, popliteus muscles, lower leg muscles.
• Functional tests: Evalute gait, sit to stand, squat, jump, hop, run, kneel, stair climbing up/down. Evaluate antalgia, reduced ROM, pain, fluidity of movement, compensatory movement.
• Neurological Examination:
  • Motor strength testing: Assess for asymmetry or weakness in key muscle groups:
    • L2: Hip flexion
    • L3: Knee extension
    • L4: Inversion
    • L5: Dorsiflexion
    • L5/S1: Knee flexion
    • S1: Plantarflexion/foot eversion
    • S2: Toe flexion
  • Sensory testing: Assess for sensory deficits in dermatomal distributions:
    • L3: Medial thigh at the knee
    • L4: Medial side of the calf
    • L5: Top of the foot and toes
    • S1: Lateral side of the foot and little toe
  • Reflex testing: Assess for asymmetry, diminished/absent reflexes:
    • L4: Patellar reflex
    • L5: Medial hamstring reflex
    • S1: Achilles reflex
  • Upper motor neuron signs: Asses increased muscle tone, hyperreflexia, pathological reflexes (e.g., Babinski sign, Clonus), pyramidal weakness. May indicate conditions affecting the central nervous system (e.g., cervical spondylotic myelopathy, multiple sclerosis, stroke, spinal cord injuries, amyotrophic lateral sclerosis, traumatic brain injury).
  • Lower motor neuron signs: Assess for Muscle weakness, muscle atrophy, fasciculations, reduced muscle tone, flaccidity, diminished reflexes. May indicate a systemic neurological condition (e.g., nerve compression, radiculopathy, trauma, peripheral neuropathy, amyotrophic lateral sclerosis).
• Special/Orthopedic Tests: Perform as clinically indicated.
• Advanced Diagnostics: Radiography is generally not recommended without red flags or specific individual factors (e.g., contraindications to treatment).

A. Patellofemoral Pain Syndrome (PFPS) (includes chondromalacia patellae, plica syndrome, quadriceps tendinopathy, patellar tendinopathy/Jumper’s Knee/infrapatellar tendinopathy, IT band syndrome).

• Patellofemoral pain is a common musculoskeletal condition with an estimated prevalence between 23% – 29%.
• Pain in anterior retropatellar or peripatellar regions.
• Pain with lower limb loading activities (squatting, stairs, jumping, walking). 
• Pain with functional testing (squatting, stairs, jumping), no neurological deficits.

B. Knee Bursitis (prepatellar, infrapatellar, suprapatellar, pes anserine)

• Common, particularly in individuals who engage in activities that involve prolonged kneeling or repetitive knee movements. Frequently seen in athletes, tradespeople, and older adults.
• Pain in anterior or medial knee depending on the affected bursa.
• Pain, swelling, occasionally redness. 
• Point tenderness, no warmth to touch, no neurological deficits.

C. Osgood-Schlatter Disease

• Common in adolescents, particularly those involved in sports.
• Pain in tibial tuberosity.
• Pain and swelling at the tibial tuberosity, often in adolescents during growth spurts.
• Tenderness and swelling over tibial tuberosity, no neurological deficits.

D. Hoffa’s Syndrome (Infrapatellar Fat Pad Impingement)

• Can occur in active individuals and those with repetitive knee stress.
• Pain In infrapatellar region.
• Pain with Anterior knee pain, especially when the knee is in extension.
• Tenderness around the fat pad, pain with knee extension, no neurological deficits.

E. Osteoarthritis (OA)

• Joint line tenderness, bony enlargement, decreased ROM, crepitus with movement, and possibly effusion; no neurological deficits.
• Common in older adults and those with a history of joint injury.
• Pain affects the medial/lateral/patellofemoral compartments of the knee.
• Pain with activity, stiffness after rest, crepitus, and sometimes swelling.

Approach to Treatment

The treatments outlined in this section reflect core domains of care consistently identified across high-quality clinical practice guidelines and established clinical practices. These include interventions shown to improve patient-important outcomes such as pain, function, and quality of life. Management plans should be tailored to the individual’s needs, goals, and preferences, taking into account clinical presentation, response to care, and contextual factors.

Not all domains need to be included in every care plan or at every stage of recovery. Clinicians are expected to apply professional judgment in selecting the most relevant components based on the clinical context.

This pathway is not prescriptive, nor does it list every possible intervention. Readers are encouraged to consult individual guidelines for specific treatment protocols, dosage, and condition-specific considerations.

While a range of other interventions may be in use, such as passive physical modalities, these have mixed or limited evidence of clinical benefit and are therefore not recommended for routine use. If applied, such therapies should be used as adjuncts to the core, evidence-based components of care, and not as standalone treatment.

1. Education and Self-Management (Willy et al., 2019; Wallis et al., 2021)
   • Education & reassurance: Emphasize non-traumatic anterior knee pain’s often self-limiting nature. Use tailored, evidence-based information in various formats (written, digital, visual) to empower individuals. Limited evidence suggests no single superior type of education for improving patient outcomes, but consistent reinforcement improves understanding and engagement.
   • Self-care: Encourage regular exercise, nutrition, sleep hygiene, stress management, weight maintenance, and avoidance of smoking/substance abuse. Employ SMART goals and Brief Action Planning for sustained engagement.
   • Daily activities: Promote continued movement and discourage prolonged bed rest to enhance recovery and prevent functional decline.
   • Social & work engagement: Encourage participation using pacing strategies and workplace accommodations to support social functioning and productivity.
   • Mobility devices: Recommend assistive devices (e.g., walkers, canes) to enhance safety and independence as needed. 
2. Exercise Therapy (Willy et al., 2019; Wallis et al., 2021)
   • Develop individualized programs focused on improving strength, mobility, and aerobic fitness, tailored to patient needs and preferences. Exercise has demonstrated benefits in reducing pain, improving functional capacity, and enhancing quality of life. No single exercise type is shown to be superior, so programs should align with patient capabilities and goals. Monitor psychological responses to exercise; refer to medical/mental health providers if signs of distress or aversion arise.
   • Types of exercises: Includes hip- and knee-targeted exercises. Preference may be given to hip-targeted exercise over knee-targeted exercise in the early stages of rehabilitation. Exercise may consist of weight-bearing (resisted squats) or non-weight-bearing (resisted knee extension) exercise. Tailor to individual needs and preferences (i.e., supervised in-clinic, home-based, gym-based). 
3. Manual Therapy (Willy et al., 2019; Wallis et al., 2021)
   • Incorporate spinal manipulation, mobilization, and soft tissue techniques to reduce pain and improve function. Manual therapy should be integrated as part of a broader care plan to maximize effectiveness.
4. Acupuncture (Willy et al., 2019; Wallis et al., 2021)
   • Incorporate acupuncture to reduce pain and improve function. Acupuncture should be integrated as part of a broader care plan to maximize effectiveness.
5. Taping (Willy et al., 2019; Wallis et al., 2021)
   • Incorporate tailored patellar taping in combination with exercise therapy to assist in immediate pain reduction, and to enhance outcomes of exercise therapy in the short term.
6. Prefabricated Foot Orthoses (Willy et al., 2019; Wallis et al., 2021)
   • Incorporate prefabricated foot orthoses for patients with greater than normal pronation to reduce pain, but only in the short term. Foot orthoses should be combined with an exercise therapy.
7. Multimodal Care (Willy et al., 2019; Wallis et al., 2021)
   • Integrate physical, psychological, and social interventions tailored to individual needs, particularly for non-traumatic anterior knee pain, to support function, work, and community engagement through predominantly non-pharmacologic care.

• Common Risk Factors: (Baldon et al., 2011; Neal et al., 2019; Post et al., 2013; Powers et al., 2012; Rathleff et al., 2013; Thacker et al., 2003)
  • Non-traumatic anterior knee pain is a common condition, particularly among adolescents, young adults, and physically active individuals. It often results from a combination of intrinsic and extrinsic factors rather than a single cause.
  • Common risk factors for non-traumatic anterior knee pain include biomechanical factors (patellar malalignment, weak quadriceps, tight IT band, excessive pronation), training and activity (overuse, sudden training increases, poor movement patterns), anatomical factors (patellar alta, trochlear dysplasia, femoral anteversion), female sex, psychological and neuromuscular factors (pain sensitization, poor motor control), environmental and occupational (hard surfaces, cold weather, prolonged kneeling).
• Prognosis: (Neal et al., 2019; Powers et al., 2012; Sigmund et al., 2021)
  • Most individuals with non-traumatic anterior knee pain improve, though recurrences are common. 
  • Negative Prognostic Factors: longer symptom duration, persistent biomechanical deficits, female sex, poor adherence to rehabilitation, high activity levels (e.g., runners, jumping sports), psychological factors (fear avoidance, catastrophizing, depression), previous history of knee pain or injury.