How our personality and behavior change when we have some diseases

Alzheimer’s disease disrupts memory and the normal thought process, multiple sclerosis causes depression and disability, and a brain tumor can trigger paranoia personality

Some diseases can drastically change our personality and significantly affect behavior change.

The ways we think, feel, react – it all makes up our personality, with its characteristics, habits, and routines. We change over the years, we adapt to situations and new circumstances, and that is normal. However, some diseases can even drastically change our personality, and significantly affect behavior change.

Alzheimer’s disease visibly changes our behavior

From person to person, personality traits are specific. This disease is one of those that changes it the most. It affects the process of thinking, reasoning, remembering and making decisions. It can make us feel confused or disoriented. At first, most people will be upset or find it easier to get upset, flare up, and experience more frequent stressful episodes. Over time, this disease leaves serious consequences on the complete personality, body, social life, work and family status.
Dementia with Levi’s bodies changes both the body and the mental status of the person

After Alzheimer’s disease, this is the next most common type of dementia. It is formed by groups of unusual proteins, called Levi’s bodies, forming in the parts of the brain that control the impulses of memory, movement and thinking. Thus, the disease affects us both mentally and physically. People who get sick tend to become more passive, show less emotion, lose interest in hobbies and other activities that they used to enjoy.

Huntington’s disease

It is a congenital disease, which, interestingly, usually manifests between the ages of 30 and 40. It damages brain cells and disrupts the thinking process. Aggressive attacks of anger towards physical manifestations (hitting the wall with the hands), or avoiding some normal life rituals, such as neglecting personal hygiene or brushing teeth, are possible. Unfortunately, some people will not even be aware of what they are doing, that is, they are no longer doing it.

Multiple sclerosis (MS)

One of the severe and progressive diseases in which our immune system practically “turns” against us, attacking the nerves in the brain and spine. The spectrum of problems it causes goes from bladder weakness to inability to walk and disability. In the domain of mental state, it can lead to a feeling of euphoria and a state without real contact with reality, to complete apathy. It can also provoke uncontrolled, unreasonable laughter that is not in line with real feelings.

Thyroid disease

The thyroid gland produces hormones that, literally, tell our body how fast and intense it is to perform certain functions. If more hormones are produced, we can feel like we are in a car with a gas pedal stuck. We can be irritable, anxious, have big mood swings. If the body does not produce enough of certain hormones, our feeling can be a “straight line”. We will be forgetful, harder to think and make decisions. If not treated adequately, thyroid disorders can have long-term effects on both the body and the brain.

A brain tumor triggers paranoia, and traumatic brain injury is also affected

Tumors in the frontal lobe of the brain affect the centers that control certain characteristics and actions (emotions, quick thinking and problem solving, as well as memory). And this disease can make us feel confused or forgetful. It can also cause mood swings, make us more aggressive or provoke paranoid thoughts, the feeling that someone is following us or that they want to hurt us. After a severe blow to the head, personality changes can be a hidden symptom that will appear over time. In more serious cases, a person may act like a completely different person, say or do things he has never done before.

Tumors in the spinal cord affect the person in a similar way. If you have pituitary cancer, which also participates in the regulation of hormone levels, the consequences and changes will go in that direction.


When the blood supply to a part of the brain is cut off, the cells in it cannot get enough oxygen. The potential damage and health effects depend on how long the stroke lasts and where it occurs in the brain. It is possible that after a stroke, you will not be able to move some parts of the body normally, and that inevitably changes our personality. You will probably find it easier to lose patience, have serious mood swings, or behave more impulsively than before.


Depression destroys literally every part of our body and life. It affects not only our mood, but also the things we think about, our memory and the way we make decisions. It also changes the way we think about the world around us. The effects of depression can vary from men to women. Women often feel worthless, sad and guilty, while men tend to feel tired, irritated and angry.

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