It is true that there is a right way to blow your nose. Medical professionals suggest certain methods to effectively clear your nasal passages while minimizing the risk of harm.
Dr. Henry Danko, an expert in internal medicine at Rush University Medical Center, says this is the right way to do it:
Slowly blow out one nose at a time. Put your finger over one nostril and slowly blow out the other via a tissue.
Do not blow too hard. Blowing too hard can cause pressure, which can cause ear pain or sinus problems.
This way of blowing your nose helps avoid problems like earaches or sinus infections that can happen when you blow your nose too hard.
https://www.rush.edu/news/how-blow-your-nose
In the same way, ENT expert Dr. Zara Patel says:
Keep your mouth open a little. This will lower the pressure inside your nose.
Blow gently: Use as little force as possible to clear your nose.
Dr. Patel says blowing gently is just as good and doesn't put as much pressure on the sinuses or ears, which can cause illnesses.
https://www.livestrong.com/article/13777440-how-to-blow-your-nose
To sum up, the right way to blow your nose is to do it gently, one nostril at a time, with little force. This will clear out your nasal tubes while lowering your health risks.