What instructions should be given to a patient with a knee sprain regarding initial care, medication, and activity?

Patient Instructions for Knee Sprain

For an acute knee sprain, immediately begin the PRICE protocol (Protection, Rest, Ice, Compression, Elevation), start weight-bearing as tolerated, take acetaminophen or topical NSAIDs for pain, and schedule physical therapy within 48-72 hours to prevent chronic instability and speed recovery.

Immediate Care (First 48-72 Hours)

PRICE Protocol

• Protection: Avoid activities that cause pain, but do not completely immobilize your knee 1
• Rest: Limit painful movements while continuing gentle weight-bearing as tolerated 1
• Ice: Apply ice wrapped in a damp cloth for 20-30 minutes every 2-3 hours during the first 48 hours—never place ice directly on skin to prevent cold injury 1, 2
• Compression: Use a compression wrap to reduce swelling, ensuring it does not cut off circulation 1, 2
• Elevation: Keep your knee above heart level during the first 48 hours to minimize swelling 1

Pain Management

• First choice: Start with acetaminophen (up to 4,000 mg daily) or apply topical NSAIDs (such as diclofenac gel) to the injured area 3, 1
• If acetaminophen is insufficient: Take oral NSAIDs such as ibuprofen, naproxen, or celecoxib to reduce pain and swelling 3, 1
• Avoid all other acetaminophen-containing products including cold remedies and combination pain medications when taking acetaminophen 3
• Do not use opioid pain medications—they cause more side effects without providing better pain relief than NSAIDs 1

Activity and Support

Weight-Bearing

• Begin walking as tolerated immediately—you do not need to stay off your leg completely 1
• Avoid only those activities that cause significant pain 1

Knee Support

• Use a knee brace or support device if recommended by your provider, particularly if you have a history of knee injuries 2
• Semi-rigid or lace-up supports are more effective than elastic bandages 2

Physical Therapy (Critical for Recovery)

Timing

• Schedule your first physical therapy appointment within 48-72 hours of injury—early supervised exercise reduces your risk of re-injury by approximately 63% 1

Exercise Components

Your physical therapist will guide you through:

• Range of motion exercises started immediately to prevent stiffness 1
• Proprioception training (balance exercises) to restore joint position sense and prevent future sprains 1
• Progressive strengthening exercises focusing on quadriceps and hamstring muscles 1, 4
• Coordination and functional drills before returning to sports or demanding activities 1

Common Pitfall to Avoid

• Do not rely on home exercises alone—supervised physical therapy produces significantly better outcomes than unsupervised programs 1

Follow-Up Care

Re-evaluation Timing

• Return for re-examination in 3-5 days after your injury when swelling has decreased—this allows more accurate assessment of ligament damage 1

Warning Signs—Seek Immediate Care If:

• You develop numbness, coldness, or severe worsening pain (possible nerve or blood vessel injury) 1
• You cannot bear any weight on the leg 1
• Your knee gives way repeatedly or feels unstable 1

Return to Activity Timeline

For Mild Sprains

• Sedentary work: 2 weeks 1
• Full return to work and sports: 3-4 weeks depending on job demands 1

For Moderate to Severe Sprains

• Sedentary work: 3-4 weeks 1
• Full return to work and sports: 6-8 weeks depending on physical therapy progress 1

Long-Term Prevention

Ongoing Exercise

• Continue ankle and knee strengthening exercises as part of your regular routine even after recovery—this prevents recurrent injuries 1

Protective Equipment

• Consider wearing a knee brace during high-risk activities (sports, uneven terrain) after recovery, especially if you have had previous knee injuries 1, 2

What NOT to Do

• Do not apply heat to your acute knee injury—use only ice during the first 48-72 hours 2
• Do not remain completely immobile—prolonged rest without movement leads to stiffness, weakness, and chronic pain 1, 4
• Do not skip physical therapy—inadequate rehabilitation is the leading cause of chronic knee instability, which affects up to 40% of patients 1
• Do not delay your 3-5 day follow-up visit—early examination cannot distinguish partial from complete ligament tears 1