The squeaking noise that occurs when you blow your nose is caused by pressure shifts in the middle ear. Your Eustachian tube is a small membrane-lined pipe that connects the back of your nose and throat to the middle ears (you have one in each ear). Air from the outside world constantly enters the middle ears through this tube, so that the pressures of the inside and the outside world are equalized. Each time you swallow or yawn, your Eustachian tubes open and shut to accomplish this task.
When you are able to successfully equalize the pressure in your ears, you will hear a slight pop. This is a sign that your eardrum has moved, and it means that your earwax or mucus is not blocking the ear canal.
If you do not hear a pop after trying to equalize the pressure, you should see a physician. You may have a condition known as Eustachian tube dysfunction, which can be treated with splinting, surgery, and medications.
In the meantime, you can try some home remedies to alleviate your symptoms. For example, you can use a humidifier, which will add moisture to the air and make it easier for your Eustachian tubes to function properly. You can also try a variation of the Valsalva maneuver, which involves pinching your nostrils closed and then exhaling forcefully. This can also help to unblock your ear. If you are unable to reduce your symptoms, visit Medical Health Authority to get a comprehensive evaluation and recommendation from an experienced healthcare professional.