I hear a sound in my ear when i'm swallowing. i also can make the sound everytime i want. the sound somehow like "click" sound. is it normal?

Normal: The sound is likely normal and is related to increase pressure of the oropharynx during swallowing and opening/closing of the tube which connects the inner ear to your oropharynx. If you develop other symptoms, call your regular doctor.

See your dentist : You should see a dentist to check the function of your temporomandibular joint, or jaw joint that is by your ear. They can make a better diagnosis and give you treatment options.

Eustachian tube: The noise is normal. Opening of eustachan tube, the tube that connects the back of your throat with your middle ear.

Disc Displacement: Disc displacement with reduction is usually not accompanied by pain indicating that most patients are able to adapt to the dysfunction. No treatment is needed.