In the first place, we would like to stress that Islam denounces excess in beautifying oneself to the extent of altering one’s physical features as Allah created them. The Qur’an considers such alterations as inspired by Satan, who “ …will command them (his devotees) to change what Allah has created…” (An-Nisa’: 119)
In this regard, Sheikh Abdus-Sattaar Fathallah As-Sa`eed, Professor of the Exegesis of the Qur’an at Al-Azhar Univ., states the following: “If it happens that a woman has a considerable emaciation in the breast, which inflicts physical and psychological pain on her, then she may treat the defect and thus alleviate the embarrassment that might render her life miserable. Allah the Most Merciful has imposed no hardship on us in religion. This is similar to plastic surgery used to treat a deformed part of the body where the operation will offer a better quality of life.
However, if she does so for the sake of excessive pleasure and attraction (for her future husband), it is not permissible because it constitutes a change in Allah’s creation, which is strictly forbidden in Islam. This change in Allah’s creation is usually the result of following the incitation of Satan. This becomes clear in the words of the Satan in the following verse: “And surely I will lead them astray, and surely I will arouse desires in them, and surely I will command them and they will cut the cattle’s ears, and surely I will command them and they will change Allah’s creation. Whosoever chooseth Satan for a patron instead of Allah is verily a loser and his loss is manifest.” (An-Nisa’: 119)
Another important reason for which breast augmentation is in general terms considered unlawful is that operations of this kind can be detrimental to one’s health while the juristic rule states that ‘there should be no harm or reciprocating harm.'”
Based on what is mentioned above, we can conclude after clarifying the Islamic ruling stating that the issue varies from one person to the other, and hence it is advisable to consult a reliable Muslim physician who is specialist in the filed.