Negative side effects to losing mass amounts of weight?

Much more apt to be chilly/cold.

Frankly - it's a lot harder to find clothes that fit. Seems more and more stores tend to stock mostly (for example) L, XL and XXL shirts than S or M. Ditto for pants (much easier to find 36, 38 & 40 waists than 29-30)

Those are the main two for me.

I can't actually think of anything bar I've now got an addiction to running shoes

I got HORRIBLE acne! After talking to my doctor about it, she determined that the cause was that I lost so much body fat that my hormones were completely out of whack and causing acne like a teenager (and I haven't been a teenager in a loooooong time!). It got bad enough that my doctor put me on medication to clear it up.

Loose skin. Lots and lots of loose skin.

Honestly, those are the only two negative effects I can think of. The benefits so far outweigh everything else. I don't necessarily care for all the comments, mainly because this has been a very personal and private journey for me and I don't particularly like talking about it, even though all comments have been overwhelmingly positive.

I've heard people say they miss the big cushion on their butts when sitting for long periods. And they don't like getting cold easier. (I'd much rather put on a sweater than be stuck in a fat-coat 24/7, though.)

I would think psychological changes far outweigh physical changes in this regard, because lots of folks talk about their brain lagging behind their body.

^THIS - So TRUE!

I am not sure I would say there are negative side effects to losing weight. How can improving your health and the way you look and feel about yourself ever be anything but positive. Yes, there are those weird things that happen with the body after losing a large amount of weight. I agree with many of the previous posters as far as some loose skin which really isn't bad if you are adding strength training to your weekly routines. Yes, I tend to get cold easier, not as much padding t keep me warm..but got used to that LOL. Buying new clothes to me is a wonderful reward of my hard work. The weirdest and most annoying thing that happened was wha losing a large amount of weight does to your bowels. LOL yes, we are going to talk about bodily functions here. I developed what many others do… Irritable bowel, yes, urgent and loose and the gas that was passed.. oh baby my friends were in disbelief. But like most weird, annoying effects of weight loss.. It too shall pas and it did. My body has learned to love it's changes.
so my dear do not think of anything as negative, just laugh and say " Hmmm, this is odd" and remember that it too.. will pass

How it's lost (speed) is more the resulting side effect described here, but best to know ahead of time to make maintenance, and actually reaching goal weight, more successful.

http://www.youtube.com/watch?v=2i_cmltmQ6A


And then many have commented they liked how much easier it was to burn much more calories moving around more mass, like for walking where they can only go so fast. So you gotta add incline or weighted vest to keep stuff like walking as good a workout as it was at the start.

My response to the Loose Skin issue...

http://www.myfitnesspal.com/topics/show/1444061-loose-skin-my-experience

I am just curious if there are any negative side effects that the body goes through while losing weight. I'd imagine that a ton of changes are happening as my muscles and bones go from carrying 360lbs to my goal of 200lbs.

It's not something I've ever seen asked, so I'm just curious.

Only thing I can think of is loose skin but that is what it is.

I've lost quite a bit and loose skin is the major negative. I was fortunate enough to not have a bad case but some people get profoundly loose skin. Other than that its mostly been positive side effects!

Gallbladder issues are somewhat common from a drastic change in diet.

So far I've lost a little over 30 lbs. What I've noticed is 'things' are looser and I've bought compression items to help. I do Piyo and some 'things' are now in my way in a different way and it feels odd to move them so I can move deeper.
Also, I have a lingering disk problem in my back that started in a couple of weeks ago such that I had to have my roommate tie my shoes to go for our walk. My doctor thinks it might be a symptom of the 'load' being rebalanced.

But, I can now keep up with my roommate when we are walking AND I don't sound like a wheezing steam engine. And I just plain feel better.

I lost 50lb in about 5 months, not completely intentionally. At that speed, you're at risk for gallbladder problems, especially if you used a low fat diet to lose weight. I had some gallbladder twinges, but nothing that was actionable. We're keeping an eye on it, but now that I've managed to slow my weight loss, it's less of a risk.

I've become b-12 deficient, and will need b-12 injections monthly for the forseeable future.

My A1c has dropped to levels that mean I have an increased risk of mortality, liver failure and heart disease.

My resting heart rate ocassionally drops to 35-40bpm, and I sometimes I have a bp below 100/70. When my blood pressure is low, I just have to be careful standing up or turning my head too far, because I'll get dizzy and my vision goes black.

Oh, and I'm still 15lb overweight.