Liposuction for Pointy Chin?

Chin liposuction is actually a misnomer. The chin is not treated with liposuction, rather this term typically refers to liposuction of the neck beneath the chin. A more accurate term is Submental (beneath the chin) Liposuction.

The chin area in front of the chin bone has very little fat and is composed mainly of the skin and numerous muscles and cannot therefore be safely treated with liposuction.

A chin implant can be placed on top of the chin bone to widen the chin and make the chin more prominent.

Specific chin implants with extensions which fit along the sides of the lower jaw bone are available and very useful for widening the chin.

Your pointy chin most likely is not from fat but the muscles. If there is some fat, it can be liposuctioned and it will help. However a better solution might be a chin implant or a filler like Radiesse to make the sides of the chin look normal and that would make your face look more symmetric and less pointy.
If you feel the chin looks more pointy with certain facial expressions, it could be from a hyperactive chin muscle (mentalis). In that case Botox will work very well to get rid of that look.
Regards

It sounds like you would benefit more from a chin reduction procedure than any liposuction. In reality, the chin is not amenable to liposuction. I would suggest talking with a facial plastic surgeon experienced in chin reduction about your concerns.