Why do I have a gut-wrenching feeling down my stomach after a friend told me something I disagree with, not physically, but emotionally?

When there is something you strongly disagree with , you do so because you have reason behind it. Its just your gut telling you ," you know that not right, start arguing on it "

When you are angry, upset, or emotional in a negative way, your body releases stomach acids that can irritate existing ulcers. This can provoke the physical response that you are feeling, but it's important to realize (like you have) that the physical response is brought on by an emotional feeling, and to stop the physical pain, you first need to deal with how you are emotionally responding to the confrontation.

Morals of a person shape who they are and how they act. Personally, feeling that way means that morally and emotionally, it isn't right for me. But there is this sense of foreboding that I should agree anyways because he/she/they is/are my friend/s. So the tension manifests itself physically.

I have experienced the similar feeling you are describing, deep in the pit of your stomach after a friend tells you something you disagree with, emotionally, not physically. I am unable to assess what the disagreement may be about but I can guess that it may have to do with something about principles, or as it is better know as, your fundamental beliefs, which influence your behavior, action, inaction, personality, your words. If something this person is saying, is striking a cord with you, chances are, it isn't sitting well with you, even if they may be someone you have known for a while. I would be curious to know the frequency of this phenomena, and do these feelings of gut-wrenching disagreement become elicited by more than just the words of your friend. It is okay to feel what you are feeling and it is okay to not feel okay, or to react emotionally. This can be exhausting for you if it becomes a pattern and it could set a precedent for the friendship. How would you feel about sharing this feeling with your friend and maybe talking it out?

It is normal to feel something inside when you disagree with something, it's because it will have triggered strong emotions inside for you

You may feel unsettled that they disagree with you on that topic, because the topic may mean a lot to you and your opinions are very strong.

It is quite normal to feel a gut-wrenching churn of the stomach after someone you feel close with tells you something you internally disagree with. It is an emotional reaction to something we disapprove of, while we might disagree it might be good to explore why we have such a visceral reaction to disagreeing with something someone said. This visceral reaction, while it doesn't feel good, might be an opportunity to explore our own emotions and realize that everyone has a right to their own opinion, even if we disagree. It is healthy and okay to agree to disagree. If we internalize it so much and never work through it, it can literally cause a physiological reaction.

Maybe you fell like you have a different idea about it than your friend that you are not familiar about and made you fell a bit funny inside.

Maybe it stems from a situation in your personal life that you’ve experienced. Having opposite views is very much fine but solving the disagreements together is even better!

Honestly, some people can't handle little things. Even if it wouldn't be a big deal to a "normal" person, it tends to bother another person more.