strips, the gel can rub off on clothes etc, the strips stay nicely in place for at least 12-24 hrs they have to be on. the gel is recommended for places that are noticeable such as the face etc, but the strips are more intense and can be easily covered with your bra. depends when ur scars are closed properly and fully healed. most wil say 6wks, i saw my nurse at 3wks and she sed i had healed great and could start using them, so everyones different. bt i wud say wait the 6wk to be safe xx