I've read that a blockage in the intestines can cause fecal body odour and I think constipation could easily cause a blockage, even if partital blockage so you can still poo. I'm too struggling with fecal Body Odor and I noticed I can smell my odor at certain times through my chest so I believe air expelled through my lungs, maybe try and see if you can pickup a slight smell anywhere and the guys on the forum can hopefully help better, best of luck hope you get cured dude! :)

Could my constipation be causing the Body Odor ?

Yes.

What is your diet like ?

Do you eat anything with wheat flour?
Cheese ?
Milk?

Bread and cheese and milk are on the top of the list of foods that slow down the time it takes for the food to pass through the intestines.
It also makes for very dry and hard poop.

Total elimination of all wheat and cheese helps to most people.

A lot of water and fruits like plums and apples, vegetables like carrots, onions, parsley, cucumbers, tomatoes, green salads, are foods that can increase the speed and can make it easier to poop as it creates a softer poop.

One day of change in diet is not enough.
It can take several days of a new diet to re-establish a new bowel flora and a new kind of poop.


Squatting on the toilet can also help poop, instead of sitting on the toilet.

Probiotics can also help to some people.

Following the Blood Type Diet can also help.

A lot of physical activity and a lot of sweating helps both with Body Odor and with constipation (you take a shower after the gym).



WS

I had something similar. Chronic constipation and smelling like poop specially in the armpits. I have had similar comments too. My constipation was so bad that sometimes I used to get blood in poop.

I was contemplating of going to doctor for years and then finally i went to gastroenterologist for my constipation. He did colonoscopy and told me usual stuff like eat fiber, drink water, etc. He also said lots of his patients get problems from dairy, so I should look into that.


Long story short, what worked for me was quitting milk.

I used to drink two glasses everyday. I used to drink everyday since I was underweight and didn't want to cut down on any calories. After I stopped milk, my BMs got regular(every morning), they got smooth, they don't come out dry anymore, no burning, no blood.

My back Acne cleared up, appetite went up, gained some weight, but most importantly the poop smell is gone. I could sniff my armpits for any hint of poop smell and there is none.

What i noticed is even my farts don't smell as bad anymore. Sometimes they don't smell at all.

So i would say you should try to resolve constipation and see if that helps.

I'm not 100% sure on this one since you can't smell it but I will post this anyways as something to consider.
It's a longer post sorry but if you rule everything else out this could be a possibility.

The smell could be from anal glands however it is pretty noticeable so I'm not sure you could miss it. Either way this is one topic in vet medicine that we all know about but seems to be virtually unheard of in human medicine. So here's a rundown of what anal glands are, what they do and why they stink.

Mammals have anal glands or anal sacs, including humans. Humans have 7 to 14 different glands. They fill with a foul smelling fluid, usually described as fishy poop smell, that is usually expressed naturally when we poop. If this doesn't happen they can become too full. Have you ever seen a dog scoot on its butt? It is trying to express the anal glands. In humans we can't do that, and have to wait for our body to do it. It can make pooping painful for what seems to be no real reason.

As far as controlling them, no animal, including humans, can control it. Some animals will express their anal glands when they are stressed by a situation, suffering from anxiety or scared. It is a reaction for defense and nothing you can do to stop it. For example, if I'm restraining a dog that is extremely upset it may express its anal glands. The most famous example though would be a skunk. Yep, same thing! When skunks spray they are releasing their anal glands. Even in skunks that is not controllable. It is a fear reaction which is why those raised with humans and other animals don't do it -
they are not afraid. When possums play dead they release their anal glands to help the illusion. Even though it is normally a fight or flight response sometimes the body will just do it when there is no stressed. Skunks and ferrets commonly have them removed in the pet trade but that is becoming a banned procedure in many places. I believe in humans they are located further up and much harder to get to. I have not found any information on anal gland removal in humans. I would assume if one abscessed it could be removed other than that in not sure.

As far as expressing them that can be done in some animals. In a vet clinic if you can put your finger in its butt they can be manually expressed - most commonly we express canine anal glands. Sometimes cats but that is an uncommon problem for them. In the event that they are not expressed they can become infected and even abscess. This happens in people too, it is the cause of an anal fistula. I believe in people the glands are not easy to get to like they are in small mammals so I do not know if it can be done in people.

When anal glands express you wouldn't necessarily feel anything, there usually is no sound like a fart. It is fluid tho so you could feel wetness or actually leakage. Theoretically stressing about it happening could make the problem worse. Although sometimes stress can have nothing to do with it and the glands will release for seemingly no reason. In small animals we don't see that as often but it does happen. Constipation or chronic diarrhea can make this issue worse because the glands are not properly able to empty. Just something to think about.