The First Few Days: Hospital and Going Home
You will spend one to three days in the hospital after total knee replacement surgery. During this time, a physical therapist will begin moving your knee gently—sometimes the same day of surgery—to prevent stiffness. You will also receive pain medication, antibiotics to prevent infection, and blood thinners to reduce clot risk. A nurse will teach you how to use crutches or a walker and show you exercises to do at home.
Before you leave, the hospital will give you a discharge packet with your surgeon's contact information, a list of your medications, and instructions for wound care. Your knee will be wrapped in a compression bandage. You may have a drain (a small tube) in the incision for the first day or two to prevent fluid buildup—this is normal and will be removed before discharge or at your first follow-up visit. Plan to have someone drive you home and stay with you for at least the first week.
Key Takeaways
- Pain and swelling peak around day three to five after surgery, then gradually improve over weeks and months.
- Physical therapy starts in the hospital and continues at home or an outpatient clinic for at least six to twelve weeks.
- You will use crutches or a walker for two to six weeks depending on your strength and how quickly your knee heals.
- Most people return to light activities like walking and sitting at a desk within four to six weeks, but high-impact activities like running take four to six months or longer.
- Swelling, stiffness, and mild discomfort can persist for six to twelve months as your knee continues to heal and strengthen.
Pain and Swelling in the First Two Weeks
Pain is worst on days two through five after surgery. You will take prescription pain medication on a schedule—do not wait until pain is severe to take it, because it is easier to prevent pain than to treat it once it builds. Most people need strong pain relief for the first one to two weeks, then transition to over-the-counter pain relievers like acetaminophen or ibuprofen as pain decreases.
Swelling peaks around day three to five and can last for weeks. Ice your knee for 15 to 20 minutes at a time, several times a day, to reduce swelling and pain. Elevate your leg above heart level when sitting or lying down—prop it on pillows so your knee is higher than your hip. Wear the compression bandage or compression sleeve your surgeon gave you. These three steps—ice, elevation, and compression—are your main tools for managing swelling at home.
Some oozing from the incision is normal for the first few days. Keep the bandage clean and dry. If you see heavy bleeding, pus, increasing redness, or warmth around the incision, or if your temperature rises above 101°F, contact your surgeon when ready—these are signs of infection.
Physical Therapy and Movement in Weeks Two Through Six
Physical therapy is the single most important part of your recovery. It begins in the hospital and continues at home or at an outpatient clinic. A physical therapist will teach you exercises to restore the range of motion in your knee and rebuild the strength in your thigh and calf muscles. You will do these exercises multiple times a day—typically 20 to 30 minutes, three to five times daily in the first weeks.
Early exercises are gentle and focus on bending and straightening your knee. Your therapist will measure how far you can bend your knee (flexion) and straighten it (extension) at each visit. Most people reach 90 degrees of bending by two weeks and 110 degrees by six weeks. Full bending (usually 120 to 135 degrees) may take several months. If you do not regain enough bending early, it becomes much harder to gain it later, so consistency matters.
Walking is also therapy. You will start with a walker or crutches and progress to a cane as your strength improves. Most people walk without a cane by four to six weeks, though some take longer. Walking on flat, even ground is safest in the early weeks. Stairs are harder and should be attempted only when your therapist says you are ready—usually around week three or four.
Returning to Daily Activities: Weeks Six Through Twelve
By six weeks, most people can walk for short distances without a cane, sit at a desk, and manage light household tasks. You may be cleared to drive if you are off prescription pain medication and can move your knee enough to operate the pedals—usually around six weeks, but ask your surgeon. Swelling may still be noticeable, especially at the end of the day or after activity.
Physical therapy typically continues through twelve weeks. Your therapist will add exercises to build strength and stability, such as step-ups, squats, and resistance band work. You will also work on balance and coordination. Pain should be mild by this point—sharp pain or sudden swelling after activity is a sign you did too much and need to scale back.
Sexual activity can usually resume around six weeks if you are comfortable and can position your knee safely. Discuss timing with your surgeon if you have concerns.
Months Three Through Twelve: Gradual Return to Normal
Between three and six months, most people return to normal walking, light exercise like stationary cycling or swimming, and most daily activities. Swelling may still come and go, especially if you overdo activity or spend a lot of time on your feet. Mild stiffness in the morning is common and usually improves with movement and gentle stretching.
High-impact activities—running, jumping, contact sports, heavy lifting—typically require four to six months or longer before your surgeon clears you. Some people never return to high-impact activities, and that is a conversation to have with your surgeon based on your goals and the type of knee replacement you received.
By twelve months, most people have regained nearly full strength and range of motion. Some swelling, stiffness, or mild discomfort can persist beyond a year, especially in cold weather or after heavy activity. This is normal and usually continues to improve slowly over time. Your knee will continue to feel better and stronger for up to two years after surgery.
Managing Complications and When to Call Your Surgeon
Most total knee replacements heal without major problems, but you should know the warning signs. Contact your surgeon when ready if you develop fever above 101°F, increasing redness or warmth around the incision, pus or heavy bleeding from the wound, calf pain or swelling (a sign of possible blood clot), chest pain or shortness of breath, or sudden severe pain or swelling in your knee that does not improve with ice and elevation.
Stiffness that does not improve with therapy by eight to twelve weeks, or a sudden loss of motion you had regained, also warrants a call. Some people develop a condition called arthrofibrosis (excessive scar tissue) that limits bending. Catching this early allows your surgeon to intervene before it becomes severe.
Mild clicking, popping, or grinding in the knee is common and usually not a problem. Swelling that comes and goes for months is also normal. If you are unsure whether something is normal, call your surgeon's office—they would rather hear from you than have a small problem become a large one.
Pain Management and Medication Over Time
Most people stop taking prescription pain medication within two to four weeks. Over-the-counter pain relievers like ibuprofen or acetaminophen work well for mild to moderate pain. Some people find that ice, elevation, and rest are enough after the first few weeks.
If pain remains severe beyond four weeks, or if you are concerned about pain medication dependence, talk to your surgeon. They may recommend different pain management strategies, such as stronger anti-inflammatory medication, topical creams, or referral to a pain management specialist. Do not stop taking pain medication abruptly without talking to your doctor first.
Frequently Asked Questions
How long before I can walk normally without pain?
Most people walk without a cane by four to six weeks and walk normally for short distances by three months. Full normal walking—including longer distances and varied terrain—usually takes three to six months. Some mild discomfort or swelling with activity is normal during this time and does not mean something is wrong.
Will my knee ever feel completely normal again?
Most people say their knee feels normal for everyday activities within six to twelve months. You may always notice mild swelling at the end of the day, especially in warm weather or after heavy activity. Some people report a slight clicking or awareness of the artificial joint, but this does not affect function for most people.
Can I return to sports or running after knee replacement?
This depends on your surgeon's recommendation and the type of replacement you received. Low-impact activities like walking, swimming, and cycling are usually safe. High-impact activities like running or jumping typically require four to six months or longer, and some surgeons recommend against them permanently. Discuss your specific goals with your surgeon before surgery.
What if my knee is still very swollen at three months?
Some swelling at three months is normal, especially if you have been active. Ice, elevation, and compression help. If swelling is severe, painful, or accompanied by warmth or redness, contact your surgeon. Persistent swelling can sometimes indicate infection or other complications that need treatment.
How often do I need to see my surgeon after I go home?
Most surgeons schedule follow-up visits at two weeks, six weeks, and twelve weeks after surgery. After that, you may see your surgeon once a year for a check-up, or only if you have concerns. Ask your surgeon's office for their specific schedule before you leave the hospital.