Why your leg feels heavy after a hip replacement, and how to lighten it

The hip moves fast, the leg follows less quickly

After a hip replacement, most patients walk on the day of surgery or the day after. It is one of the orthopaedic operations with the fastest recovery.

And yet, a few days after you get home, you look at your leg and it seems large. The thigh feels tight, the knee looks puffy, sometimes the ankle too. The hip itself does not particularly hurt. It is disconcerting, and nobody warned you.

Why the swelling travels down the leg

Surgery causes local inflammation, and that inflammation produces fluid. In a knee, the fluid stays in the joint. In a hip, it has nowhere to stay: it follows gravity and runs down the thigh, towards the knee, sometimes as far as the ankle.

That is why you can have a swollen thigh while the operated hip is not painful. It is the normal path fluid takes in a leg that was operated on at the top.

That said, a heavy leg is not harmless. It weighs on every step, it tires you faster, it makes walking less fluid, and walking is what your rehabilitation is built on. Swelling left to settle slows everything else down.

One important reservation: swelling that increases suddenly, with a calf that is hard, warm and painful, is not the swelling described here. That one calls for your surgeon straight away.

Week by week: the reference points

Cold and compression: what the study shows

Cryocompression pairs controlled cold, between 1 and 10 degrees, more stable and better tolerated than an ice pack, with dynamic compression that inflates and deflates like a light massage. On a hip, what it targets is exactly the fluid that has run down into the thigh.

Cryotherapy has been measured in this setting. A 2019 randomised study followed 60 patients after hip replacement, half with cryotherapy and half without¹.

In practice: sessions of 20 to 30 minutes, several times a day in the first week, then mainly at the end of the day in the weeks that follow, when the thigh has swollen with activity. The wrap covers the hip and extends down the thigh, where the fluid collects. In that study, the patients who were cooled reported markedly better satisfaction with their ability to walk, 62 out of 100 against 38 at day four¹. That is the week in which swelling weighs most on every step you take.