If I had chin (submental) lipolysis, can I do chin liposuction easily in future? Does fibrosis occur in all chin lipolysis case?

While some mild fibrosis does occur, it is most certainly possible to have chin liposuction following a cryolipolysis procedure. Liposuction or other open techniques would be the preferred steps if the results you desire were not achieved by noninvasive methods.

Tissue destruction with the use of chemicals, typically causes a fairly substantial inflammatory response with the development of scar tissue.
This can be equal to or more extensive than scar tissue formed from previous liposuction.
There no absolute yes or no answers to your question.
Everything is relative.
If most of your subcutaneous fat was removed with your previous procedure then you should expect to have a substantial amount of scar tissue.
If your previous procedure had virtually no impact then Your subcutaneous fat layer is probably fairly normal and intact without a significant amount of scar tissue.
Your candidacy for future Liposuction should be assessed by an in person consultation.
Best,
Mats Hagstrom MD