Changing Nose Tip by Manipulating the Cartilage by Hand?

Gravity, or any other force, will have a gradual effect on the nasal skeleton. Pushing your tip upwards, would cause no long term changes. Hope this helps. Dr Joseph

Short of breaking your nasal bones by hand (a hard task to do and a painful one), there's really no way that you can cause a change such as you describe. Cartilage cannot be manipulated manually to produce any meaningful or lasting shape change.
If you're concerned about your nasal appearance, speak to a surgeon well-trained and experienced in rhinoplasty.
All the best,
--DCP

Hand shaping should not work but tip cartilages may possibly be disloged.The upper nose is bone and will not be able to be shaped.the middle nose (upper lateral cartilages) are strong and will be hard to shape.Cartilage tends to spring back, much like trying to shape your ears into your head with your hands.