I hurt / I'm hurting / I'm hurt / It hurts / It's hurting - Do I understand correctly?
This is one topic I'm confused the most even after a lot of research. Do I understand correctly?

1. I hurt. / He hurts (V1) , physically injured regularly, BUT nobody uses this.

2. I hurt / He hurt (V2) physically injured in the past, BUT use it with other words, not stand alone
e.g. I hurt myself falling down the stairs yesterday. / He hurt himself cutting his fingers this morning. / She hurts me.

3. I'm hurting. continuous pain emotionally, upset, unhappy
e.g. I'm hurting on the inside right now. / She's been hurting since her boyfriend left her.

4. I'm hurt something hurt me emotionally.
e.g. I'm hurt because my mother scolded me. / She's hurt because they don't want her to go with them.

4. It hurts very common.
e.g. My hand hurts. / My feet hurt. / Ow! that hurts!

Thanks in advance.

Question

I hurt / I'm hurting / I'm hurt / It hurts / It's hurting - Do I understand correctly?
This is one topic I'm confused the most even after a lot of research. Do I understand correctly?

1. I hurt. / He hurts (V1)>>> , physically injured regularly, BUT nobody uses this.

2. I hurt / He hurt (V2) >>> physically injured in the past, BUT use it with other words, not stand alone
e.g. I hurt myself falling down the stairs yesterday. / He hurt himself cutting his fingers this morning. / She hurts me.

3. I'm hurting. >>> continuous pain emotionally, upset, unhappy 
e.g. I'm hurting on the inside right now. / She's been hurting since her boyfriend left her.

4. I'm hurt >>> something hurt me emotionally. 
e.g. I'm hurt because my mother scolded me. / She's hurt because they don't want her to go with them.

4. It hurts >>> very common. 
e.g. My hand hurts. / My feet hurt. / Ow! that hurts!

Thanks in advance.

Answer

As Sharon said, most of those are fine. A couple of points though:
1: We do use it occasionally, e.g. I really hurt after that run.
4: Is not only emotionally. It's also physically. I'm hurt - can you please get an ambulance.

Answer

All your examples are fine.  I've actually never thought about how confusing that word is!

Answer

I see how this verb can be confusing. Hurt is both a transitive and intransitive verb. I think the context is the only way that the meaning is made clear.