The teachings of Islam focus on developing inner beauty and not prioritizing external physical appearance. Permanent physical changes, such as cosmetic improvements and interventions, are not allowed because they are considered to alter and change Allah's creation. This poses a potential problem for Muslim men and women considering lip filler treatment, as it is haram to do so. Some people argue that Islam focuses on the growth of inner beauty, while outer beauty should not be the top priority and that a moral limit should be imposed when it comes to changing physical appearance away from “God's creation”.
It is important to remember that even though you don't have the exact characteristics that are currently “ideal”, you're still beautiful. The topic is often complex for Islamic patients because lip fillers are temporary and, therefore, the line is often blurred between what is a permanent change in one's body and what is a short-term change in one's appearance. Everyone must perform their own ijtihad and come to their own conclusions about what is haram or halal. It is important to remember that beauty comes from within and that it is not necessary to alter your physical appearance in order to be beautiful.
Trends come and go, and it is important to stay true to yourself and your beliefs. Ultimately, it is up to each individual to decide whether or not lip fillers are haram or halal.