There’s nothing as entertaining as a mental illness, except perhaps for everything in the world. Mental illnesses may seem like a joke to some people, but there are millions of individuals quietly suffering from something right now. Mental illnesses are all around the world, and can happen to anyone. The following are some of the most horrible and just plain strange types of mental illness.

1. Diogenes Syndrome

Sometimes a senior citizen will take on bizarre behaviors such as hoarding things and animals, and neglecting their own cleanliness. While the real Diogenes was no hoarder, his name is attached to this ultimate loss of hope.

2. Alien Hand Syndrome

Have you ever felt like your hand wasn’t listening to your commands? If so, you might have Alien Hand Syndrome, which means your hand is doing its own thing. It might end up manipulating tools, making a sandwich or even removing your clothing without your instructions to do so.

3. Cotard’s Syndrome

Do you ever feel like a zombie right after you wake up? Imagine having that happen all the time. This is fairly normal. However, a professional with a psychology degree could explain that a person afflicted with Cotard’s Syndrome actually thinks they’re rotting, missing their internal organs or blood, or even that they don’t exist at all. That’s a whole lot less normal.

4. Schizoid Personality Disorder

Schizoid Personality Disorder tends to manifest itself subtly, and shows up a seeming indifference to things like praise and insults. They tend not to effectively show emotions, either. Frequently, an individual afflicted with this illness will do everything in their power to avoid contact with other people, because they do their best in isolation.

5. Folie a Deux

This disorder is less born and more learned, as it tends to develop when an individual is exposed to another person’s insanity for a long time. Over time any kind of belief can seem normal and reasonable if you’re exposed to it enough.

6. Mythomania

This is also known as being a pathological liar. In a lot of cases the mythomaniac will actually believe their lies, at least when they’re in public, because they’re playing a role. Sometimes they believe their own lies all the time.

7. Pica

Pica is an eating disorder where a person will eat things that aren’t food. They may consume buttons, rocks, hair, dirt, or anything else that isn’t food but that appeals to them. Pica tends to result in horrible medical complications, because these are generally items that can’t be digested and may get caught in a person’s intestinal tract.

There are a lot of bizarre problems that can happen in the human mind. This list is just some of the weirdest among that group. If you don’t have any of these issues, you should consider yourself lucky.