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Swelling After Knee Replacement: Dr. Mayur Rabhadiya Explains What Is Normal

Is Swelling Normal After Knee Replacement?

Swelling is common after knee replacement surgery.

It may affect:

  • The knee

  • Lower leg

  • Calf

  • Ankle

  • Foot

Swelling develops because surgery causes a normal inflammatory and healing response in the tissues around the knee.

It may also be influenced by:

  • Temporary reduction in mobility

  • Increased blood and fluid flow to the healing area

  • Bruising

  • Muscle weakness

  • The leg remaining down for long periods

  • Increased walking or exercise

  • Individual circulation and medical health

The operated knee may also feel warmer than the opposite knee during recovery.

Normal swelling should generally improve gradually, although it may fluctuate according to activity.

A more active day may be followed by increased swelling in the evening or the following morning.

Dr. Mayur Rabhadiya is an Orthopedic & Joint Replacement Surgeon in Mumbai with a focused practice in total, partial, robotic-assisted and revision knee replacement.

For the complete recovery pathway, read Knee Replacement Recovery Timeline.

Where Can Swelling Occur?

Postoperative swelling is not always limited to the knee.

Fluid may move downward because of gravity and cause swelling around the:

  • Shin

  • Calf

  • Ankle

  • Foot

  • Toes

Bruising may also gradually move down the leg.

This can make the ankle or foot appear more swollen several days after surgery, even when the surgical incision is healing.

However, one-sided calf swelling associated with increasing pain, tenderness or redness should not automatically be assumed to be routine postoperative swelling.

How Long Does Swelling Last?

There is no fixed date by which swelling must disappear.

The amount and duration vary according to:

  • Total or partial replacement

  • One or both knees

  • Primary or revision surgery

  • Preoperative deformity

  • Surgical complexity

  • Body weight

  • Circulation

  • Medical conditions

  • Activity level

  • Pain control

  • Physiotherapy

  • Individual healing

Swelling is usually greatest during the early recovery period.

It should gradually reduce over the following weeks, although mild swelling after walking, exercise or prolonged standing may continue for several months.

The important factor is the overall trend.

Swelling that gradually becomes less severe is generally more reassuring than swelling that is progressively increasing.

Why Swelling May Increase During the Day

Swelling frequently increases toward the evening because the leg has remained below the level of the heart during:

  • Sitting

  • Standing

  • Walking

  • Physiotherapy

  • Household activity

  • Travel

Gravity allows fluid to collect in the lower leg and ankle.

The knee may therefore feel:

  • Tight

  • Heavy

  • Stiff

  • More painful

  • Harder to bend

This does not necessarily indicate an implant problem.

Activity may need to be divided into shorter sessions with appropriate rest and elevation between them.

Swelling After Physiotherapy

A temporary increase in swelling may occur after:

  • Knee-bending exercises

  • Strengthening

  • Stair practice

  • Longer walks

  • Stationary cycling

  • Increased resistance

Some reaction is expected when activity is progressed.

However, the exercise programme may need adjustment if swelling:

  • Becomes markedly worse after every session

  • Persists into the following day

  • Causes loss of previously achieved movement

  • Prevents safe walking

  • Produces severe pain

  • Interferes significantly with sleep

Physiotherapy should be progressive rather than forceful.

Read Physiotherapy After Knee Replacement Surgery.

How to Reduce Swelling

Swelling-management advice should follow the instructions of the operating surgeon and physiotherapist.

Common measures may include:

Leg Elevation

The leg may be elevated so the ankle is above the level of the heart when practical.

The support should generally be placed beneath the heel and lower leg rather than keeping the knee permanently bent over a pillow.

Cold Therapy

Cold application may help reduce:

  • Pain

  • Swelling

  • Muscle soreness

A protective cloth should be placed between the cold pack and skin.

Cold should not be applied directly to numb skin or for excessively prolonged periods.

Ankle Movements

Regular ankle pumps may support circulation and reduce prolonged pooling of fluid.

Short, Frequent Walks

Walking supports circulation and muscle activation.

One prolonged walk may produce more swelling than several shorter walks spread through the day.

Activity Modification

The patient may need to reduce:

  • Prolonged standing

  • Excessive walking

  • Repeated stairs

  • Heavy household work

  • Long periods with the leg hanging down

Prescribed Medication

Blood-thinning and pain medicines should be taken exactly as directed.

Patients should not increase medication or add anti-inflammatory treatment without checking medical suitability.

Should the Knee Be Massaged?

Gentle soft-tissue techniques may sometimes be used by a trained physiotherapist when appropriate.

Patients should avoid forceful or unapproved massage over:

  • The healing incision

  • Areas of marked redness

  • A painful swollen calf

  • Open skin

  • Wound drainage

  • Suspected infection

  • Suspected blood clot

A painful swollen calf should be medically assessed rather than massaged.

Compression Stockings

Compression stockings may be recommended in selected patients to support circulation and swelling management.

They must:

  • Fit correctly

  • Avoid folding or rolling

  • Not create excessive pressure

  • Be removed and reapplied according to instructions

  • Allow monitoring of the skin and circulation

Patients should report:

  • Increasing numbness

  • Severe tightness

  • Toe discoloration

  • A cold foot

  • Skin injury

  • Increasing pain

Not every patient requires the same duration of compression use.

Normal Swelling Versus Possible Blood Clot

Routine postoperative swelling commonly:

  • Affects the knee and lower leg

  • Changes with activity and elevation

  • Improves gradually

  • Occurs without severe calf tenderness

  • Is accompanied by expected postoperative discomfort

Possible signs of deep-vein thrombosis include:

  • New or increasing calf pain

  • Calf tenderness

  • New or increasing calf, ankle or foot swelling

  • Red or discoloured skin

  • Swelling that does not improve with elevation

  • A firm or unusually tight calf

Not every blood clot causes obvious symptoms.

Medical assessment may include a duplex ultrasound when a clot is suspected.

Sudden breathlessness, chest pain, coughing blood or fainting may indicate pulmonary embolism and requires emergency care.

Infection and Swelling

Infection around a knee replacement may cause:

  • Increasing swelling

  • Increasing or persistent pain

  • Redness around the incision

  • Wound drainage

  • Progressive stiffness

  • Fatigue

  • Increasing warmth

Fever may occur, but infection can sometimes be present without fever.

Infection should be considered when a knee that had been improving begins to become:

  • More painful

  • More swollen

  • More stiff

  • More red

  • Less functional

Evaluation may require:

  • Clinical examination

  • Blood inflammatory markers

  • Joint-fluid aspiration

  • Microbiology testing

  • Imaging

Patients should not begin leftover antibiotics independently because antibiotics can interfere with infection testing.

Wound Drainage

A small amount of early staining on a dressing may occur according to the closure method and postoperative protocol.

However, ongoing or increasing drainage requires review.

Contact the treating team when there is:

  • Persistent wetness of the dressing

  • Blood repeatedly soaking through the dressing

  • Yellow, cloudy or foul-smelling fluid

  • Separation of the incision

  • Increasing redness around the wound

  • Increasing pain or swelling

  • Drainage after the wound had appeared dry

The wound should not be soaked in water until it has sealed and the surgical team permits it.

Bruising After Knee Replacement

Bruising may appear around the:

  • Knee

  • Thigh

  • Calf

  • Ankle

  • Foot

It may become more visible several days after surgery as blood spreads through the tissues.

Bruising is often more noticeable in patients taking blood-thinning medication.

Prompt review is appropriate when bruising is associated with:

  • Rapidly increasing swelling

  • Severe tightness

  • Dizziness

  • Marked weakness

  • Persistent wound bleeding

  • A significant fall

  • Inability to bear weight

Sudden Swelling After a Fall

A fall may cause:

  • Soft-tissue injury

  • Bleeding

  • Wound damage

  • Fracture around the implant

  • Implant-related injury

Seek assessment when a fall is followed by:

  • Sudden swelling

  • Severe pain

  • New deformity

  • Inability to stand

  • Inability to bear weight

  • Wound opening

  • Loss of knee movement

The patient should not attempt to “walk it off” when weight bearing is no longer possible.

Swelling and Knee Movement

Swelling may limit knee bending and make the knee feel tight.

It can also inhibit the quadriceps and contribute to:

  • Weakness

  • Difficulty lifting the leg

  • Knee buckling

  • Limping

  • Difficulty with chair rise

Reducing swelling may therefore improve both comfort and function.

However, complete inactivity is usually not the solution.

The rehabilitation plan should balance:

  • Movement

  • Rest

  • Elevation

  • Strengthening

  • Walking

  • Pain management

Is a Warm Knee Normal?

The operated knee may remain warmer than the opposite knee during healing because of increased blood flow and tissue activity.

Warmth may be expected when it is:

  • Mild

  • Gradually improving

  • Not associated with wound drainage

  • Not accompanied by increasing redness

  • Not associated with progressively worsening pain

Warmth should be reviewed when it is accompanied by:

  • Increasing swelling

  • Spreading redness

  • Persistent severe pain

  • Wound drainage

  • Progressive stiffness

  • Feeling unwell

Swelling After Partial, Total and Robotic Replacement

Partial Knee Replacement

Early swelling may be less extensive in some patients because more natural bone and soft tissue are preserved.

Individual recovery still varies.

Read Partial Knee Replacement in Mumbai.

Total Knee Replacement

Total replacement involves broader joint resurfacing and may produce greater early swelling.

Read Total Knee Replacement in Mumbai.

Robotic Knee Replacement

Robotic assistance may support planning and bone preparation but does not eliminate postoperative inflammation or swelling.

Read Robotic Knee Replacement in Mumbai.

When Swelling Persists for Months

Residual swelling may continue during the later recovery period, particularly after:

  • Long walks

  • Travel

  • Exercise

  • Prolonged standing

  • A significant increase in activity

Persistent swelling should be assessed when it is:

  • Not gradually improving

  • Associated with significant pain

  • Accompanied by recurrent warmth or redness

  • Limiting movement

  • Associated with instability

  • Present after an initially symptom-free period

  • Developing months or years after surgery

Possible causes may include:

  • Infection

  • Implant loosening

  • Instability

  • Wear

  • Recurrent inflammation

  • Venous circulation problems

  • Another medical condition

Read Pain After Knee Replacement Surgery.

When to Contact the Treating Team

Seek prompt assessment for:

  • Rapidly increasing swelling

  • New or increasing calf pain

  • Swelling that does not improve with elevation

  • Increasing redness

  • Wound drainage

  • Increasing pain after initial improvement

  • New inability to bear weight

  • Repeated knee giving way

  • New weakness or numbness

  • A fall followed by swelling or severe pain

Seek emergency care for:

  • Sudden breathlessness

  • Chest pain

  • Fainting

  • Coughing blood

  • A cold, pale or blue foot

Why Patients Consult Dr. Mayur Rabhadiya

Dr. Mayur Rabhadiya follows a structured approach to swelling after knee replacement.

His assessment emphasises:

  • Distinguishing expected postoperative swelling from complications

  • Examining the wound and surrounding skin

  • Assessing calf tenderness and circulation

  • Reviewing pain and activity patterns

  • Evaluating knee movement and stability

  • Investigating infection when indicated

  • Arranging blood-clot assessment when necessary

  • Adjusting rehabilitation when activity is excessive

  • Avoiding unnecessary tests when swelling is following a normal recovery pattern

Read more about Dr. Mayur Rabhadiya’s qualifications and joint-replacement practice.

Knee-Replacement Follow-Up in Ghatkopar, Mumbai

Diabplus Clinic, Ghatkopar East

601, 6th Floor, Skyline Status, Mahatma Gandhi Road, opposite Pooja Hotel, Pant Nagar, Ghatkopar East, Mumbai, Maharashtra 400077.

Visit Dr. Mayur Rabhadiya in Ghatkopar East.

Savla Clinic, Ghatkopar West

2/3, Dharmodaya Building, next to Raj Medical, near NULife Hospital, Jivdaya Lane, Ghatkopar West, Mumbai, Maharashtra 400086.

Visit Dr. Mayur Rabhadiya in Ghatkopar West.

Frequently Asked Questions

Is swelling normal after knee replacement?

Yes. Swelling around the knee, lower leg, ankle and foot is common during early recovery.

How long does swelling last?

It generally reduces over several weeks, although mild activity-related swelling may continue for several months.

Why is my ankle swollen after knee surgery?

Fluid can move downward because of gravity, especially while sitting, standing or walking.

Why does swelling increase in the evening?

The leg remains below heart level during the day, allowing fluid to collect in the lower leg and ankle.

Can physiotherapy increase swelling?

Yes. A temporary increase may occur after greater exercise, but marked or persistent worsening may require programme adjustment.

Should I stop walking when the knee swells?

Not automatically. Walking should usually continue in shorter, appropriate sessions unless the treating team advises otherwise.

Does elevation help?

Elevation may help reduce fluid accumulation when performed according to postoperative advice.

Can I apply ice?

Cold therapy may help pain and swelling when used safely with skin protection.

Is warmth around the knee normal?

Mild warmth may occur during healing. Increasing warmth with redness, drainage or worsening pain requires review.

What swelling may indicate a blood clot?

New calf pain, tenderness, redness or swelling that does not improve with elevation requires prompt assessment.

Can a blood clot occur without obvious symptoms?

Yes. Some deep-vein thromboses cause few or no noticeable symptoms.

What swelling may indicate infection?

Increasing swelling with persistent pain, incision redness, drainage or progressive stiffness may indicate infection.

Is fever always present with implant infection?

No. Knee-replacement infection can occur without fever.

Should a painful swollen calf be massaged?

No. It should be medically assessed before massage or increased exercise.

When is swelling an emergency?

Swelling accompanied by sudden breathlessness, chest pain, fainting or a cold and pale foot requires emergency care.

Why is swelling still present months later?

Residual activity-related swelling may persist, but worsening or recurrent swelling should be assessed for infection, instability, loosening or circulation problems.

Can robotic surgery prevent swelling?

No. Robotic assistance does not eliminate the normal inflammatory response to surgery.

About the Author

Dr. Mayur Rabhadiya
Orthopedic & Joint Replacement Surgeon

Qualifications

  • MBBS

  • D’Ortho

  • DNB Orthopedics

  • MNAMS Orthopedics

  • Fellowship in Robotic & Computer-Navigated Joint Replacement

Clinical focus

  • Knee-replacement recovery

  • Swelling after knee replacement

  • Total and partial knee replacement

  • Robotic-assisted knee replacement

  • Blood-clot and infection warning-sign assessment

  • Painful knee-replacement evaluation

  • Revision knee replacement

Written and medically reviewed by: Dr. Mayur Rabhadiya
Last medically reviewed: June 2026

Clinical References

Book a Knee-Replacement Follow-Up Consultation

Consultation may be useful if:

  • Swelling is progressively increasing

  • The calf has become painful or tender

  • Swelling does not improve with elevation

  • The wound is red or draining

  • The knee is becoming more painful or stiff

  • Swelling has returned months after surgery

  • Recovery appears delayed

  • You require postoperative guidance or a second opinion

Book an orthopedic consultation with Dr. Mayur Rabhadiya in Ghatkopar, Mumbai

Call or WhatsApp

+91 84249 03913
+91 96113 30063

Medical Disclaimer

This page provides general patient education and does not replace individual postoperative instructions or medical assessment. Swelling patterns vary according to the operation, activity, circulation, medical health and complications. Seek prompt medical advice for rapidly increasing swelling, calf pain, wound drainage, increasing redness, worsening pain or inability to bear weight. Sudden chest pain, breathlessness, fainting, coughing blood or a cold and pale foot requires emergency care.

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