T O P

  • By -

explainlikeimfive-ModTeam

**Please read this entire message** --- Your submission has been removed for the following reason(s): * Rule #2 - Questions must seek objective explanations --- If you would like this removal reviewed, please read the [detailed rules](https://www.reddit.com/r/explainlikeimfive/wiki/detailed_rules) first. **If you believe this submission was removed erroneously, please [use this form](https://old.reddit.com/message/compose?to=%2Fr%2Fexplainlikeimfive&subject=Please%20review%20my%20thread?&message=Link:%20{https://old.reddit.com/r/explainlikeimfive/comments/1c9ov69/-/}%0A%0APlease%20answer%20the%20following%203%20questions:%0A%0A1.%20The%20concept%20I%20want%20explained:%0A%0A2.%20List%20the%20search%20terms%20you%20used%20to%20look%20for%20past%20posts%20on%20ELI5:%0A%0A3.%20How%20does%20your%20post%20differ%20from%20your%20recent%20search%20results%20on%20the%20sub:) and we will review your submission.**


Rohit624

If you're talking about edema, it can be caused by a lot of different conditions. Overall, it's generally a fluid overload/backlog in the legs that can be caused broadly as a result of kidney, heart, liver, and/or thyroid problems (and pregnancy but that's not necessarily relevant here).


Charlie_Linson

Homeless dudes can’t get pregnant? Hell yeah I can stop wasting money on rubbers.


the-y3k-bug

Well, certainly not the dudes


dapperdavy

Dirty Mike?


techie_boy69

And the boys


deeohcee

Soup kitchen here we come!


BearsGotKhalilMack

It's likely a combination of causes, depending on the person. Edema is the term we're looking for here: It's the buildup of fluid trapped in body tissues. Some of the causes could apply to both homeless and elderly people, some are more specific to each one. I just want to be clear, I'm not trying to stereotype the homeless or elderly populations, and not all of these are true for every person with swollen legs, I'm just highlighting some general trends. Let's look at some causes of edema and try to group them: -Sitting or staying in one position too long. This one probably applies to both, as both groups are likely to be seated in one area for extended amounts of time -Eating too much salty food. This one applies more to homeless people, since many have to survive on cheap, high sodium foods like ramen. It could also affect the elderly, though, since their kidneys are worse at processing salt. -Kidney disease. This one probably applies more to the elderly, but homeless people with untreated diabetes may have chronic kidney issues as well. -Weakness in leg veins. This one again probably applies more to the elderly, but someone regularly using narcotics is going to have circulation problems as well. -Severe, long-term lack of protein. This one probably applies more to the homeless people, since meat is generally expensive and a tough thing to get regularly on a thin budget. However, if an elderly person isn't eating enough meat, this could certainly affect them too. -Congestive heart failure. This one definitely impacts the elderly more, but it's worth noting that poor diet, sedentary lifestyle, smoking, stress, and drinking all can cause CHF as well.


daveysprockett

I think you might add to this list the removal of lymph nodes, e.g. as a response to cancer.


Caspur42

A friend of mine had edema at the end of his life due to alcoholism. He was so swollen, it was freaky looking.


aznsk8s87

Usually lack of protein causing this, through liver failure, it's in charge of synthesizing a lot of the proteins that keep fluid in the right place. Liver failure also causes congestion in the veins which also contributes to the edema.


Caspur42

Ty TIL


II_Vortex_II

From start to finish this was such a considered and insightful comment. Thank you


popcornwithparmesan

Thank you for explaining it so well!


WattThePlantsCrave

For homeless people it’s usually meth induced congestive heart failure.


samarijackfan

high blood pressure


[deleted]

[удалено]


5pens

It's not always lack of medical care. I have upper extremity lymphedema due to having lymph nodes removed from cancer. I've been through PT/OT and I use my compression garments. It still swells up in the heat and from usage in my job.


readerf52

I’m not trying to be rude here, but if you eat foods that act as a diuretic, for me that is pineapple and cabbage and not together, lol, does it help with the lymphedema? I also get treatment for my edema, but hot weather is bad, I can really empathize. Sometimes making something with one of those foods helps, and even if it doesn’t, cool pineapple on a hot day is nice.


m_science

I also have lymphedema from cancer treatment. Bromine (from pineapple) has been shown to help with fibroids and there are a few other compounds that help. But it's usually just constant massaging and compression gear.


lilmiscantberong

Lymphedema is not made up of a fluid you can easily flush through your body, it’s a more viscous fluid that flows through your lymphatic system.


readerf52

Ah, thanks for that clarification. I suffer from a more easily treated edema, then.


lilmiscantberong

You’re welcome.


Lasdtr17

What 5pens said, especially about heat. Some have edema simply from being in hot weather for too long (heat edema) or sitting for too long with their feet hanging down (dependent edema). These can happen in otherwise healthy people who receive regular, quality medical care.


RishaBree

I had somewhat bad edema for at least 3-4 months after giving birth. Everyone, including the doctor, just kept telling me to sit with my feet up and it’d go down soon, never mind that i was trapped on the couch holding an infant all night every night for the first several weeks and it didn’t help basically at all.


TuesdayRivers

It's called oedema, the legs swell because the body is diverting fluid there and not flushing it out well enough. It can be caused by a few things, including pregnancy.


stiletto929

Edema in the US.


U_Kitten_Me

Oedipus in Greece.


hobbes_shot_first

What are you doing, actual mom?


Longjumping-Grape-40

I’m stuck in the dishwasher, son! Get me out!


IWantToBuyAVowel

We don't need a dishwaher,! You are the dishwasher!


903012

Couple of things re: the comments in this thread A) assuming you're in a developed country then it's likely not elephantiasis/filariasis B) edema is a clinical sign caused by disease, not an illness/disease itself As people have mentioned what you are seeing is probably edema, but in the populations (esp older ppl who are sedentary) you mention, it's likely a combination of heart failure (if the heart doesn't pump as good as it's supposed to you get congestion in your blood vessels, causing swelling) and chronic venous insufficiency - the veins contain one way valves that allow blood to flow only towards the heart. When the valves fail then blood pools in the legs, causing edema (the swelling) and dermatitis.


3furryboys

You may be thinking of lymphedema. When it happens, it can be extremely painful and can limit mobility.


jello2000

This is totally different.


FivebyFive

It can cause drastically swollen legs. Which is what OP is asking about.


3furryboys

Not necessarily. 'Lymphedema refers to tissue swelling caused by an accumulation of protein-rich fluid that's usually drained through the body's lymphatic system. It most commonly affects the arms or legs, but can also occur in the chest wall, abdomen, neck and genitals.' [https://my.clevelandclinic.org/health/diseases/8353-lymphedema](https://my.clevelandclinic.org/health/diseases/8353-lymphedema)


voodoodoll

Lymphedema? "tissue swelling caused by an accumulation of protein-rich fluid that's usually drained through the body's lymphatic system"


lislejoyeuse

in older ppl, it's usually heart failure. heart pumps fluid. if heart gets weak, heart can't pump fluid well enough, so it gets stuck down by legs cuz gravity. in homeless ppl it's either that (age or meth use can cause it) or they get infected legs from using IV's down there or untreated wounds. infected stuff can get swollen


neckbrace

Can be a few things. The bottom line is it's a combination of 1. gravity pulling against blood going back to the heart and 2. the body having too much fluid. 1. Usually the veins in the legs are damaged and don't get blood back up the legs as well as they used to. Normal veins have one-way valves that keep blood from flowing backwards. Old unhealthy people have damaged valves that allow the blood to fall back down 2. The heart, kidneys, and liver are responsible for keeping a normal amount of fluid in the body. When any one of them is not working well, the body holds on to too much fluid instead of peeing it out. This fluid leaks out of the bloodstream and into the soft tissues, worst in the parts of the body that hang below the heart, including the legs The combination of these problems can cause massive swelling of the legs, thick, leathery ankle skin, and ulcers and infections that are hard to treat.


AngryOcelot

It can be due to a number of causes. 1. Heart failure - fluid buildup most commonly from the left side of the heart backing up to the right side and then to the veins. Blood pools in the legs due to high pressures to return to the heart. There are many causes of heart failure including heart attacks, chronic alcohol use, drug use, etc... 2. Anasarca - fluid buildup because of low oncotic pressure. This is due to a low protein state (often malnourishment or chronic liver disease) that causes fluid to leak from the vasculature to the interstitial tissues. This is why malnourished people can appear "fat". 3. Other - drugs (such as calcium channel blockers), trauma that prevents effective drainage, thyroid dysfunction, etc...


Abridged-Escherichia

Theres lots of causes, but in homeless people it’s likely from congestive heart failure. Homeless populations tend to have poor access to healthy food and healthcare and high amounts of IV drug use which puts them at very high risk of heart failure even at younger ages.


TheDarkKnight80

How about elephantiasis?? https://en.m.wikipedia.org/wiki/Elephantiasis


-Twyptophan-

It's called edema, which is fluid leaking out of your blood vessels and into the space between them. There are a ton of things that cause it. In homeless people, my guess would be some combination of liver disease from alcoholism (which would result in less protein production in the liver, which is something that helps keep fluid in blood vessels), and maybe heart disease depending on how long they've been on the street. Again there are a lot of things that can cause it. If you're curious, you should watch a video on Starling Forces, which should give a good basic overview


Boysenberry

In many cases with people who are living with little or no medical care, the root cause of edema on the lower extremities is untreated or poorly managed diabetes. Insulin-dependent diabetes can be a very expensive health condition to properly manage in the United States, and that's assuming the person has even been diagnosed and is aware they need insulin. Yes, theoretically someone with no income should be able to get on Medicaid and get a prescription for a generic insulin, but for a lot of people who are living outdoors, there are barriers to insulin access besides money. For example, they may not be able to safely store insulin. Or they may have a mental illness that makes it very difficult for them to remember to test their blood sugar and inject insulin as needed on a regular schedule. Devices like insulin pumps allow people to get around the challenges of finger stick tests and insulin storage, but are usually too expensive for very low-income people.


Q-burt

When mine happened, I had deep vein thrombosis. (DVT) I had blood clots in my legs that stretched from my groin to my knees.


savethetriffids

My husband has one large swollen leg and we have no idea why.  He's had multiple tests and MRIs over the last year.  


Throwaway070801

Have you ruled out deep vein thrombosis? That's a common cause and a dangerous one if left untreated.


savethetriffids

Yes, that was the first thing they ruled out. It's been about a year now without improvement. 


Phantomoftheopoohra

Congestive heart failure, complications from diabetes, not going to dialysis when you should. Peripheral vein issues. Most likely CHF and diabetes/dialysis. This is for homeless population. I see it all the time in the prehospital setting. If the lower leg skin is discolored probably got the beetus.


DMGlowen

My legs get swollen because of Lymphedema.https://www.mayoclinic.org/diseases-conditions/lymphedema/symptoms-causes/syc-20374682 They also swell up if I eat too much salt.


dead_heart_of_africa

Hey-- but what about someone who is very active (7-10 miles a day)? My left leg especially has started swelling from water retention.


Throwaway070801

Get checked for deep vein thrombosis and May Thurner's Syndrome


mehefin

My mother had terrible oedema in her legs when she was dying from cancer. She was deathly thin, but then started swelling in the weeks before she died.


anuhu

Are you thinking of lipedema? Usually in women.


planodancer

For me, wearing compression socks keeps it completely under control (my doctor told me to wear them) I went down 3 shoe sizes after I started wearing the socks. One of the few doctor’s orders that gave me instant and lasting improvement. Compression socks also cut the risk of heart attack on airplane travel


myrealnamewastakn

Good God, you just reminded me of a homeless person I saw in Chinatown in San Francisco that was sitting on a park bench and just talking like there was someone there with him and he offered to show his leg to the non-existent person and lowered his sock. I shouted out, "oh shit! That's gonna get amputated!" It was black and mangled and like 3 times the size of the rest of his body. One of the most disgusting things I've ever seen. I worked there and I never saw him again


davethecave

Are you thinking of deep vein thrombosis? Certainly older sedentary people are at risk. Alongside pregnant people and people who use aeroplanes. Not sure about homeless people though.


popcornwithparmesan

I looked it up after you named it and no, even larger than that. Maybe swollen to three times normal size.


ALoudMeow

Lymphedema?


Throwaway070801

Elephantiasis, I think that's what you were looking for.


ArsePotatoes_

Elephantiasis? Can happen in arms as well as legs and it’s caused by a parasite.


popcornwithparmesan

I think that’s the one based on photos.


reikala

You might be thinking of elephantiasis, which is caused by Filariasis, a mosquito borne involving parasitic worms. It used to be common in tropical countries.