Does anyone know the symptoms of laryngitis?

Does anyone know the symptoms of laryngitis?

He is experiencing severe difficulty due to laryngitis symptoms.
If there are people experiencing the same symptoms,
I'm leaving this message to see if I can receive help.

At first, it was just a simple discomfort in the throat, but...
Over time, the symptoms of laryngitis worsened gradually.
The symptoms of laryngitis I am currently experiencing have increased in various ways.

1. Neck pain: It worsens especially when talking or swallowing. It is most painful upon waking in the morning, and although it improves somewhat as the day passes, it still remains uncomfortable.
   
   
2. Hoarse voice: The voice easily cracks, and speaking for a long time worsens the sore throat and hoarseness.
3.  
4. Cough: Especially at night, the cough worsens, making it difficult to sleep properly.
5.  
6. Pharyngitis: The inside of the throat becomes swollen and red, making it difficult to swallow food.
7. 
8. Fever: Occasionally, a slight fever occurs, and the body feels generally tired and lethargic.

My daily life has become very difficult due to these symptoms of laryngitis.

I'm planning to go to the hospital to get a diagnosis, but,

Are there any simple treatments or management methods I can do at home?