What happens if you blow into a nose is it harmful?

Blowing into someone's nose can introduce unwanted bacteria or viruses into their sinuses, potentially leading to an infection or other health problems. It is generally not recommended to blow directly into someone's nose.

Some reasons why blowing into someone's nose can be harmful include:

- Spread of germs: When you blow into someone's nose, you can transfer germs from your mouth to their nose. This can lead to a variety of infections, including the common cold, flu, and sinusitis.

- Increased pressure in the sinuses: Blowing into someone's nose can increase the pressure in their sinuses. This can cause pain and discomfort, and can also damage the delicate tissues in the sinuses.

- Ear problems: Blowing into someone's nose can also force air into their ears. This can cause pain, discomfort, and hearing loss.

If you want to help someone who is congested, there are safer and more effective ways to do so. For example, you can:

- Offer them a tissue. They can use the tissue to blow their own nose gently.

- Encourage them to drink plenty of fluids. Staying hydrated can help to thin mucus and reduce congestion.

- Use a saline nasal spray. Saline nasal sprays can help to flush out mucus and relieve congestion.

- Use a humidifier. A humidifier can help to add moisture to the air and reduce congestion.

If someone you know is experiencing severe congestion, it is important to see a doctor. They may need antibiotics or other treatments to clear up their infection.