If someone with thyroid problems starts to behave differently, then, as far are I know, the first thing that shows is that they trust no one. Not a single perseon, not even close family members.

Something that stands out in the early stages is that someone gets all kinds of unreasonable ideas.
That is especially noticeable if someone was a reasonable and down to earth person before.
I have not seen that the behaviour returned to normal when someone has no thyriod at all.

In my opinion, the strongest emotion is that someone with thyroid problems feels hurt.

Someone with thyroid problems can quickly feel hurt and indignant.
I asked a question on a forum with thyroid patients, and almost everyone reacted indignantly. The only one who reacted normal, was someone with a healthy thyroid.

Someone with thyroid problems can have such strong emotions, that there is almost no room to empathize with the feelings of others.
It can even disappear completely. I have experienced that someone without a thyroid taunted a third person who had only a few days to live, only to take revenge on me, because the person without a thyroid imagined that I had said something wrong.

People with thyroid problems can sometimes be certain that there is something that I should do or buy. Even when I say it is not suitable for me, then they stay strongly convinced that they are right.

The emotions of someone with thyroid problems can increase a lot. The fears can be strong agony without a reason. The reason can be made up. The anger is not just anger, but it can be an intense anger that can last a few days. Someone with thyroid problems can angrely scream at someone for two hours. That can be without any reason, the reason can be made up at that moment.
It is also possible that someone with thyroid problems walks trough the house for a few hours a day with intense anger.
The person with thyroid problems never apologizes afterwards.
One of the fears can be the fear of taking not enough hormone medication. In that case the person with thyroid problems tries to convince the doctor that there is a special reason why they need a higher dose. Some doctors are apparently willing to give a dose that is too high a dose.
It is known that someone with a dose that is too high can bounce through the house. It is less known that someone gets the behavior that I describe on this page, when someone has a dose that is too high for years.

If someone with thyroid problems is anxious that someone else says something about the behavior, than the person with thyroid problems can start to harasse and bully others to feed their own fears.
There is no limit to that bullying, it keeps increasing. When the person that is harassed finally says something about it, then that can be used by the person with thyroid problems to feel even more anxious and angry.

When someone with thyroid problems is confronted with the behavior, they can lie as if their life depends on it.

Someone with thyroid problems experiences those strong emotions, and knows that it is not going well. The person with thyroid problems has especially a fear of being called crazy. To deal with that, they very firmly convince themselves that the emotional problems are the fault of someone else.

For example, when I tell about my neck problems and that some things are too burdensome for my neck, then they make up an other explanation.

In extreme cases, someone with thyroid problems can be convinced that someone else is going to say something hurtful, that they indeed think that they hear that person say something hurtful. Even though the other person said nothing hurtful. That can happen at that very moment, at the moment that somone else says something.

Somone with thyroid problems can pick someone and forever bully that person.
I have not heard that something like this stopped. As long as both live, the bullying can continue for life.
Others can also be harassed, and the worst bullying can pass to someone else, but in most cases, it remains mainly focused on that one person.
That is usually not a father or a mother, but it can be a brother or a sister. As far as I know it is someone in the near circle of family and acquaintances.
I think the harassment is a way of having power over someone, but that's my personal opinion.

Someone with thyroid problems can harass someone else in a specific way, and at the same time claim to be harassed by the other in that particular way. While the other person is not part of it and has not started to participate in the harassment.
This is almost impossible to explain to others. For example, if someone wants to mediate and I tell that it is exactly the other way around than told, then they don't believe me.

Someone with thyroid problems can tell one story after another how terrible it is what someone else is doing them, while all those stories are made up.
Some people think that if someone tells so many stories, then something must be true.
Every time such a story is told, it can be made worse.
Those stories are very convincingly. It is told, for example, that there are others with were who can confirm it. Those others do sometimes not dare to say that it is not true, because of fear of being harassed themselves.

If someone with thyroid problems has targetted someone to bully and notices that that person is friendly with a third person, then the person with thyroid problems can try to turn the third person against the targetted person. It starts by bombarding the third person with lies. The person without a thyroid can even drag other people into it to influence that third person. Even healthcare professionals (such as caregivers and nurses) can be used drive a wedge between those two people. That third person can also be bullied, only to put that person against the targetted person.

This manipulating of others seems to works very well. In my situation, almost everyone believes those lies and many people have turned against me. The people who turned against me, could probably not imagine that all those stories were lies.
That has such a huge emotional influence on me, that the only thing I can do, is completely break contact with people who turned against me.

Some of the people who turned against me, triumphantly accuse me of something. I don't understand that behavior. Perhaps there is an psychological explanation for it, or they are just mean people.

If others know about the problems, and try to stay away from it, then they can still be dragged into it.
Someone with thyroid problems can involve others in the problems even before they realize it.

A person without a thyroid can try to start a quarrel with a nasty remark, even if someone only says "Hello".
That is often at the moment that the person without a thyroid walks a way or closes a door. The other can therefore not react on it and can not say that it is not true.

Someone with thyroid problems sometimes thinks that it is good to talk about the problems with something about the trouble that they feel are in. For example, with a social worker or psychologist. However, the person without a thyroid can get entangled in the own emotions and made up stories, which only makes it worse.

Someone with thyroid problems can not be addressed on the behavior. The behavior usually gets worse after that.

Somone with thyroid problems can react very strongly emotional. For example when addressed about the behavior, so that others don't dare to say anything about it.
It is possible that a single sentence or even a single word can result in a year long (or longer) obsession to bully the person who said it.

For someone with thyroid problems it seems to be important to know something about someone, without ever saying what it is or what the source of the information is.

I know the people with thyroid problems who have picked me, only in some kind of panic state.
But there are times when someone with thyroid problems can pretend to be a normal good person. They can be relaxed and friendly and involved. For example, if someone is at the doctor for the annual check-up, or when someone is trying to turn others against me with all kinds of lies. Most people fall for that, and they can't accept when I tell them.
Someone without thyroid, where the problems have risen enormously, can still be a good contribution to society in a good and committed way.

When someone with thyroid problems is busy and has a lot to do, then the behavior can get a lot worse.
There is often an interaction. A person without a thyroid who is busy can also physically do more and cross borders. That is then used to blame others for it.
I don't know if doing sports (in a healthy way) also makes it worse.

If someone has a proposal, then someone with thyroid problems can go be enormously indignant about it. Half an hour later, someone with thyroid problems can propose the same thing themselves.
Someone with thyroid problems can tell extensively how wrong something is, but half a year ago, they did that themselve.

Someone with thyroid problems can be completely unreasonable about something, for example about their own behavior.
People like social workers, pastors, psychologists and others go assuming that someone who is friendly and reasonably is also able to have a conversation in a reasonable way.
I have never been able to make it clear that someone with thyroid problems can be totally unreasonable in some respects.