By reviewing what twelve health institutions publish on swimming after surgery, we found contradictory answers: two weeks in one British hospital, three in another, four to six weeks after cataract surgery, one to three months after a corneal transplant. We investigated why. The answer is simple, and no one is saying it: on this issue, the evidence is lacking.
« Despite such an apparently simple query, evidence supporting any answer seems to be lacking. Many patient information sites advise against swimming after the suturing of wounds but fail to provide evidence to support this recommendation. Advice is broad ranging and inconsistent. » Browne K, Fisher A, Hettiaratchy S. Should we advise patients with sutures not to swim? BMJ, 2014.
What was actually tested: the shower, not the bath
Three randomized trials compared wetting a closed scar to keeping it dry. None found a difference in infection rates. Here's what they did and what they measured.
| Étude | What was compared | Results on infections |
|---|---|---|
| Cochrane Review, 2013 Only one trial was included, involving 857 patients and minor skin excisions. There is a high risk of bias. |
Dressing removed at 12 hours and bath resumed, counter-dressing kept for at least 48 hours. | 8,5% versus 8,8% Relative risk 0,96, confidence interval 0,62 to 1,48.There is currently no conclusive evidence available from randomised trials regarding the benefits or harms of early versus delayed post-operative showering or bathing |
| Annals of Surgery, 2016 444 patients, thyroid, lung, inguinal hernia, face and limbs. Clean or clean-contaminated wounds. |
Showers are permitted from 48 hours onwards, provided the wound is kept dry. | 1,8% versus 2,7% p = 0,751. Patients allowed to shower were more satisfied, and the cost of care was lower.Clean and clean-contaminated wounds can be safely showered 48 hours after surgery. |
| J Am Acad Dermatol, 2024 437 patients, skin surgery, randomized evaluator-blind trial. |
Contact with water from 6 hours, against the usual 48-hour dry protocol. | 1,8% versus 1,4% p greater than 0,99. No difference either in bleeding, hematomas and scar appearance.Surgical wounds can be allowed to get wet in the immediate postoperative period with no increased incidence of infection or other complications and with similar cosmesis. |
References found via PubMed. Toon CD, Sinha S, Davidson BR, Gurusamy KS. Early versus delayed post-operative bathing or showering to prevent wound complications. Cochrane Database of Systematic Reviews, 2013;(10):CD010075. DOI · Hsieh PY et al. Postoperative showering for clean and clean-contaminated wounds. Annals of Surgery, 2016;263(5):931-936. DOI · Samaan C, Kim Y, Zhou S, Kirby JS, Cartee TV. Early postoperative water exposure does not increase complications in cutaneous surgeries. J Am Acad Dermatol, 2024;91(5):896-903. DOI
What this really changes for you
Not much on what to do next, and a lot on worry. If your team told you forty-eight hours, follow their advice: they know your wound, its depth, how it closed, and your medical history, and these trials are based on clean, closed wounds in healthy people.
However, if your dressing gets wet by accident on the first day, it's not a disaster. In the only trial that tested contact with water as early as the sixth hour, the infection rate was 1,8% compared to 1,4% in the group that remained dry, and the scars were considered equivalent. The forty-eight-hour rule is a conservative guideline, not a biological threshold crossed to the minute.
Something that has never been tested: swimming, and immersing oneself in water
This is the most important point, and the least discussed. The three trials mentioned above concern showering and contact with water, not swimming in a pool or bathing in the sea. No randomized controlled trials exist for these two specific activities. Therefore, the timeframes published by hospitals are not based on clinical trials, but on a cautious approach and established departmental practices. This explains why they vary from one institution to another, and no one is wrong.
A serious nuance justifies this caution, and it has nothing to do with scars. A meta-analysis published in 2018 in the International Journal of Epidemiology compared swimmers in coastal waters to non-swimmers, all individuals included and without surgery: swimmers reported more health problems, with an odds ratio of 1,86 for all symptoms, 2,05 for ear infections, and 1,29 for digestive issues. Swimming in the sea is not a neutral act, even with intact skin, and a recent wound certainly doesn't make it any safer.
Leonard AFC et al. Is it safe to go back into the water? A systematic review and meta-analysis of the risk of acquiring infections from recreational exposure to seawater. International Journal of Epidemiology, 2018.
What we can learn from this for our reference framework
We continue to publish the institutions' deadlines exactly as they write them, without correcting them or calculating an average. But this page changes how they are interpreted, and we prefer to state this clearly rather than perpetuate the illusion of a science that doesn't exist.
- Regarding the shower, the differences between sources are of little importance. Three tests converge, and none finds a difference. One establishment that says twenty-four hours and another that says forty-eight do not really contradict each other.
- In swimming and bathing, the gaps reflect a void. Two hospitals that quote two and three weeks for the same procedure are not basing their estimates on any clinical trials. Knowing this allows you to ask your surgeon rather than searching for the answer online: it's not there.
- The silence of the springs becomes legible. When a hospital record says nothing about swimming, it's not always an oversight. Sometimes it's honesty.
The complete record, with its deadlines and their original citations, is in the resumption deadline repository.
One thing is beyond dispute: a scar that becomes red, hot, painful, swollen, oozing, or accompanied by fever must be examined immediately, regardless of whether you have been swimming or not. No information on this page can replace this examination.
This page presents the evidence, not guidelines. The cited trials involved clean, closed wounds in individuals without specific risk factors. They say nothing about open wounds, drains, grafts, prostheses, situations with weakened immunity, or your specific case.
The instructions of the team that operated on you take precedence in all circumstances, including when they are more cautious than what the literature says.
