By the chin piercing the canaliculus runs vertical through the point of the chin.
By this piercing must be paid attention to the consistency of the dermal tissue, so if there enough tissue exists. Otherwise always the risk of early outgrowing exists. The chin piercing also could be stitched horizontal through the chin.
Certainly the healing could be a bit difficult and lengthy, because this area is claimed by chewing for example and so it is in movement more often.
For piercing jewellery a curved barbell is applied.