What do people get wrong about swollen legs and feet?
This answer is a draft. It stays unpublished until legal review and source verification are complete.
Heavy, puffy legs by evening are a shared experience everywhere, and in Japan the word for it, *mukumi* (むくみ), is part of everyday conversation. Most of it is nothing to worry about. But there are patterns that must not be missed, and knowing them matters wherever you live.
Swelling not to worry about, and swelling to see a doctor about
| Type | Details |
|---|---|
| Temporary | Long periods in the same position (standing or sitting for work), a cold body. Blood flow slows and it happens to anyone. Basically nothing to worry about |
| See a doctor | Only one leg ／ appeared suddenly ／ comes with shortness of breath, breathlessness when lying down, or weight gain over a few days ／ has not gone down by morning |
Swelling in one leg only is generally described as possibly involving a clot or a vein or lymph problem; in both legs with breathlessness, the heart; in the face or the whole body, the kidneys.
[Verify] The above is based on explanations from several internal-medicine and cardiology clinics. Before publication, confirm with medical review or academic-society material.
Misunderstanding 1｜Drinking water causes swelling
Cutting back on the fluids you need is not recommended. Other factors, such as how much salt you eat, are also involved. Do not restrict fluids on your own judgement.
Misunderstanding 2｜Only people who stand all day get it
Sitting for long periods causes it too. What matters is how long you stay still.
Misunderstanding 3｜A hard massage will get rid of it
Strong pressure can put a load on the tissue. Avoid any force that causes pain.
Misunderstanding 4｜A night's sleep always resets it
It usually goes down overnight, but if it does not, another factor may be involved.
Misunderstanding 5｜Leave it alone and it is nothing to worry about
If even one item in the "See a doctor" row above applies to you, do not judge for yourself. See a doctor.
---
Sources
- MHLW e-Health Net [厚生労働省 e-ヘルスネット]
https://www.e-healthnet.mhlw.go.jp/
- National Cerebral and Cardiovascular Center [国立研究開発法人 国立循環器病研究センター]
https://www.ncvc.go.jp/
- Ministry of Health, Labour and Welfare (MHLW) [厚生労働省]
https://www.mhlw.go.jp/
⚠️ Editorial note: the source URLs above were identified by search. Our working environment cannot reach go.jp domains, so the contents have not been checked against the text. Verify every source before publication and record who checked it and when.
About this article
What we share here are ideas and everyday practices passed down among people living in Japan, together with general information drawn from public sources. They are not official recommendations, and they are not professional instruction. Practices vary between households and regions.
This is general information. Results vary from person to person and depend on your own conditions and surroundings.
Please decide for yourself, using your own judgement, whether any of this suits your situation. We cannot accept responsibility for any damage, loss or injury arising from following this article.
This article is not meant to diagnose or manage any specific medical condition. If you are worried about your health, see a doctor rather than relying on your own judgement.
Sources
Tell us if this has changed
Approved contributions keep the contributor's name, shown in five languages.
Related questions
Other languages：日本語 ／ 简体中文 ／ 繁體中文 ／ 한국어
Value Village is not a government body. Always confirm procedures on the official site.
Written by Value Village from public sources. Nothing here is reproduced from another site.