Q: Is it permissible for a man to:
1. Use facial exercises to either make his lips slimmer or bigger, or to improve their eye shape? This only trains or untrains the muscles of the face and doesn't necessarily permanently change the structure of the face.
2. Use chin tucks to increase his jawline visibility? Chin tuck is an exercise by help of which fixes their neck posture. Effectively leading to jawline visibility.
3. Reduce fat using lifestyle changes to get slimmer nose, or increase fat using lifestyle changes to get bigger nose, and similarly to get sharper or softer facial features?

A: The additional beauty that men look for nowadays is actually meant for women only. Men need to be strong, brave, robust and wanting to explore ways to become closer to Allah Ta`ala. If these are for a genuine sickness or ailment then you may do them.
And Allah Ta'ala (الله تعالى) knows best.
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