The First 24 Hours: Hospital or Surgical Center

You will wake in a recovery room with your leg elevated and likely wrapped in compression bandages or a cooling device. A nurse will check your vital signs, pain level, and the surgical site regularly. You may feel drowsy from anesthesia for several hours, and nausea is common—tell staff if you feel sick, as they can give you medication.

Most people stay overnight or go home the same day, depending on the type of anesthesia used and your overall health. Before you leave, a physical therapist will show you how to use crutches or a walker and teach you basic movements like bending your knee slightly and straightening your leg. You will receive written instructions about wound care, medication timing, and when to call your surgeon.

Expect significant swelling and bruising around the knee—this is normal and peaks around day three or four. Pain is managed with prescription medication, ice, elevation, and compression. Your surgeon will prescribe antibiotics to prevent infection and blood thinners to prevent clots, since surgery increases that risk temporarily.

Key Takeaways

  • Swelling and bruising peak in the first three to four days and gradually improve over weeks, not days.
  • Physical therapy starts when ready after surgery and continues at home multiple times daily for several months.
  • You will need crutches or a walker for two to six weeks, depending on your strength and how quickly you regain motion.
  • Most people return to light activities like short walks indoors within two to three weeks, but heavy lifting and high-impact exercise are off-limits for three to six months.
  • Infection, blood clots, and stiffness are the main complications to watch for, and your surgeon will give you specific warning signs to report.

Weeks One and Two: Managing Pain and Starting Movement

Pain is worst in the first one to two weeks. Take your prescribed pain medication on schedule rather than waiting until pain is severe—staying ahead of it makes physical therapy easier and helps you sleep. Ice your knee for 15 to 20 minutes at a time, several times a day. Elevation is critical: prop your leg on pillows so your knee is higher than your hip, which reduces swelling and pain.

A physical therapist will visit your home or you will go to an outpatient clinic two to three times per week. Early therapy focuses on gentle range-of-motion exercises: bending and straightening your knee, lying on your stomach to stretch the front of your thigh, and walking short distances with your assistive device. These movements feel stiff and uncomfortable, but they prevent scar tissue from forming and restore motion faster than rest alone.

You will do prescribed exercises at home on days you do not see the therapist—typically 20 to 30 minutes, two to three times daily. This sounds like a lot, but breaking it into smaller sessions (10 minutes in the morning, 10 at midday, 10 in the evening) makes it manageable. Consistency matters far more than intensity at this stage.

Weeks Three to Six: Reducing Assistive Devices and Building Strength

By week three, most people can put weight on the surgical leg without crutches, though many continue using one crutch or a cane for balance and confidence. Swelling is noticeably less, and pain medication doses often decrease. You may still need pain relief at night or after activity, but daytime pain should be manageable with ice and elevation.

Physical therapy shifts toward strengthening. You will do exercises to build the muscles around your knee—quadriceps sets (tightening the thigh muscle), straight-leg raises, and gentle squats or step-ups. Walking distance increases gradually: many people walk 5 to 10 minutes indoors by week four and can manage short outdoor walks by week six. Walking on flat, even surfaces is easier than stairs or uneven ground.

Bending your knee (flexion) and straightening it fully (extension) are the two critical measurements your therapist tracks. Most people reach 90 degrees of bending by week six, though full bending (120 degrees or more) takes longer. If you are not reaching these milestones, your therapist will adjust your exercises or your surgeon may recommend more intensive therapy.

Months Two and Three: Returning to Daily Activities

By two months, most people walk without an assistive device on level ground, climb stairs one step at a time (rather than one foot per step), and manage light household tasks. Swelling is mild and usually only appears after activity or at the end of the day. Many people stop prescription pain medication by this point, though over-the-counter pain relief may still help after exercise.

Physical therapy typically continues one to two times per week, focusing on strength, balance, and functional movements. You may begin stationary cycling, which is gentler on the knee than walking and builds strength efficiently. Swimming or water walking is excellent if you have access to a pool and your incision is fully healed (usually by week four to six).

Driving is usually safe by six to eight weeks if you can bend your knee enough to sit comfortably in a car and have good control of your leg. Check with your surgeon before driving, especially if you are still taking prescription pain medication. Return to work depends on your job: desk work may be possible by week four to six, while jobs requiring standing, walking, or heavy lifting take longer.

Months Four to Six: Rebuilding Strength and Confidence

By month four, most people have regained a normal walking pattern and can manage stairs, light hiking, and everyday activities without thinking about their knee. Swelling is minimal unless you overdo activity. Physical therapy may end by month three or four, though your therapist will give you a home exercise program to continue indefinitely.

This is when people often push too hard, thinking they are "healed." Your knee is structurally healed by three months, but the muscles and tissues around it are still rebuilding. High-impact activities—running, jumping, heavy lifting, contact sports—remain off-limits until your surgeon clears you, usually at the four to six month mark. Even then, returning to these activities is gradual, not when ready.

Some people experience a plateau in progress around month three or four. Swelling may increase slightly, or bending may not improve further. This is common and usually resolves with continued therapy and patience. If progress stalls significantly, talk to your surgeon about whether additional therapy or other interventions would help.

Six Months and Beyond: Long-Term Recovery

Most people reach their maximum improvement by six to twelve months after surgery. At this point, you should be able to walk, climb stairs, and manage most daily activities without limitation. Many return to recreational activities like golf, swimming, cycling, and hiking. Your surgeon will advise on what is safe for your specific situation.

Some swelling may return if you overdo activity, and you may notice your knee feels stiff after sitting for a long time—this is normal and improves with movement. Ice after activity and elevation at night can manage minor swelling indefinitely. Over-the-counter pain relief is rarely needed by this stage unless you have a particularly active day.

Ongoing home exercises are important. Even after formal physical therapy ends, continuing quadriceps and hamstring strengthening exercises two to three times per week helps maintain strength and prevents future problems. Many people find that regular walking, swimming, or cycling keeps their knee feeling best.

Warning Signs That Require when ready Contact With Your Surgeon

Call your surgeon right away if you develop sudden severe pain not relieved by ice and elevation, increased swelling or warmth around the incision, fever above 101°F, drainage or opening of the incision, calf pain or swelling (which can signal a blood clot), or sudden loss of motion or ability to straighten your knee. These are not common, but they need prompt attention.

Mild swelling, bruising, and stiffness are expected and do not require emergency contact. Similarly, pain that improves with ice, elevation, and medication is normal. If you are unsure whether something is concerning, call your surgeon's office—they would rather hear from you than have a small problem become serious.

Frequently Asked Questions

When can I shower or bathe after surgery?

Most surgeons allow showering once the incision is sealed, usually within one to two weeks. Keep the incision dry by covering it with plastic wrap or a waterproof bandage. Avoid soaking in a bathtub until your surgeon says the incision is fully healed, typically four to six weeks after surgery.

How long does swelling last?

Swelling peaks around day three to four and gradually improves over weeks. Most people see significant improvement by six weeks, but mild swelling can persist for three to six months, especially after activity. Elevation, ice, and compression help manage it throughout recovery.

Is it normal to feel clicking or popping in the knee?

Yes. Clicking, popping, or grinding sensations are common after knee replacement and usually decrease over time as swelling resolves and scar tissue matures. These sensations are rarely painful and do not indicate a problem unless accompanied by pain, swelling, or instability.

Can I sleep on my side or stomach after surgery?

Most people can sleep on their side by week two or three once pain decreases. Sleeping on your stomach is usually possible by week four to six, though some people find it uncomfortable longer. Use pillows to support your leg and keep your knee in a comfortable position.

What if I am not progressing as fast as expected?

Recovery speed varies widely based on age, overall health, and how much physical therapy you do. If you are significantly behind the typical timeline—for example, unable to bend your knee 90 degrees by week eight—talk to your surgeon. Additional therapy, manual stretching, or other interventions may help, but waiting and hoping usually does not.