Preparing for knee arthroscopy
Informed by recognized medical guidance
Overview
Knee arthroscopy is a type of keyhole surgery where a surgeon uses a tiny camera (called an arthroscope) to look inside your knee joint and fix problems. It is done through small cuts, so it is less invasive than open surgery.
Key facts
- Knee arthroscopy is used to diagnose and treat many knee problems, like torn cartilage or ligaments.
- The surgery usually takes less than an hour, and many people go home the same day.
- Recovery time varies, but most people can walk with crutches soon after and return to normal activities within a few weeks.
Yes, knee arthroscopy is a common surgery. Thousands of people have it each year to help with knee pain and movement problems.
It can affect people of all ages, from young athletes with sports injuries to older adults with wear-and-tear in the knee joint.
Symptoms
- You cannot put any weight on your leg at all after an injury
- Your knee looks out of shape or dislocated
- You have severe pain that does not go away with rest
- ⚠Your knee is very swollen and hot to touch, which could be a sign of infection
- ⚠You have a fever along with knee pain and swelling
Common symptoms
- Pain in the knee that does not get better with rest or simple treatments
- Swelling or stiffness in the knee
- A feeling that the knee is catching, locking, or giving way
- Difficulty bending or straightening the knee fully
Symptoms in children
- In children, symptoms might include limping or avoiding activities they used to enjoy, like running or playing sports.
Symptoms in older adults
- Older adults may notice more stiffness, grating sensation, or pain after walking or climbing stairs.
Causes
Main causes
- Injuries from sports or accidents, like a torn meniscus (the cushioning cartilage) or a torn anterior cruciate ligament (ACL)
- Wear and tear over time, such as osteoarthritis (the breakdown of joint cartilage)
- Loose pieces of bone or cartilage floating inside the knee joint
Risk factors
- Playing high-impact sports like football, basketball, or skiing
- Being overweight, which puts extra stress on the knees
- Having a job that involves repetitive kneeling, squatting, or heavy lifting
When to see a doctor
See a doctor urgently if:
- If you have sudden knee pain after an injury and cannot walk or stand on that leg
- If your knee is red, hot, and very swollen, which could be a sign of infection
Book a routine appointment if:
- If you have ongoing knee pain that limits your daily activities and has not improved with rest, ice, or over-the-counter pain relievers
- If your knee often gives way or locks up when you move
Diagnosis
Your doctor will start by asking about your symptoms and examining your knee. They may move your leg in different ways to check for problems.
Tests that may be done
- X-rays to look at the bones and check for arthritis or fractures
- An MRI scan (magnetic resonance imaging) to get detailed pictures of the soft tissues like cartilage, ligaments, and tendons
- Sometimes an ultrasound to see fluid or soft tissue issues
What to expect at your appointment
If your doctor thinks you need knee arthroscopy, they will refer you to an orthopedic surgeon (a bone and joint specialist). Before surgery, you will have a check-up to make sure you are healthy enough. The surgeon will explain the procedure, risks, and recovery.
Treatment
Treatment for knee problems often starts with non-surgical options. If these do not help, knee arthroscopy may be recommended to repair or remove damaged tissue.
Self-care at home
- Rest the knee and avoid activities that cause pain
- Apply ice packs for 15–20 minutes several times a day to reduce swelling
- Elevate your leg on a pillow when sitting or lying down
- Do gentle range-of-motion exercises as advised by a physiotherapist
Medical treatments
Your doctor may suggest over-the-counter pain relievers or anti-inflammatory medicines to help with pain and swelling. You can also see a physiotherapist for exercises to strengthen the muscles around your knee. In some cases, steroid injections into the knee can reduce inflammation.
When is surgery considered?
Surgery is usually considered when non-surgical treatments have not worked after a few months, or if you have a specific injury like a large meniscal tear or a loose body that needs removal.
Living with this condition
After knee arthroscopy, you will need to rest and follow your surgeon's advice. You may use crutches for a short time. Icing and elevating your leg helps with swelling. You can usually return to light activities within a week or two, but full recovery may take several weeks.
Lifestyle tips
- Follow your surgeon's plan for activity, which may include avoiding high-impact sports for a while
- Use crutches as instructed and do not rush to put weight on your leg
- Attend follow-up appointments to monitor your healing
Diet and exercise
Eating a balanced diet with enough protein, vitamins, and minerals can help your body heal. Stay hydrated. Your physiotherapist will give you exercises to regain strength and motion. Avoid heavy lifting or deep knee bends until cleared.
Mental health and emotional wellbeing
Recovering from surgery can be frustrating, especially if you are used to being active. It is normal to feel a bit down or anxious. Talk to your healthcare team about your feelings – they can offer support or connect you with a counselor.
Prevention
You cannot prevent all knee injuries, but you can lower your risk by keeping your leg muscles strong, warming up before exercise, and using proper technique during sports. Wearing supportive shoes also helps.
Complications
If left untreated
- If a knee problem is left untreated, it may lead to more damage, such as worsening arthritis or a torn ligament that does not heal properly
- You might develop chronic pain or instability that makes walking difficult
Long-term outlook
For most people, knee arthroscopy is a safe and effective procedure that relieves pain and improves knee function. With proper rehabilitation, many return to their normal activities and enjoy a better quality of life.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Guidance may differ by country or region. Confirm local recommendations with a qualified healthcare provider.