There's no scientific evidence that nose exercises or “nose yoga” can reshape your nose. An example of a nose exercise that's being promoted on many websites is pinching your nose while flaring your nostrils.

Does pinching your nose help?

Pinch your nose.

Pinching sends pressure to the bleeding point on the nasal septum and often stops the flow of blood.

How can I make my nose sharper?

First make an “O” shape with your mouth. Next, using your index fingers, gently push your nostrils halfway so that you can still breathe through your nose. Look up at the ceiling, and breathe out through your nose while flaring your nostrils. In order to see results, repeat this exercise multiple times a day.