Whether or not you consider having a tattoo to be a sin will depend on your personal convictions and religious beliefs. The Bible specifically calls out not having tattoos in Leviticus 19:28; however, the interpretations of this can vary. Many recognize the words in the context of pagan and satanic rituals. Therefore, if you're getting a tattoo of that kind as a practicing Christian, it may be considered a sin. If not, it's a personal preference. The teachings of Islam also indicate that permanent tattoos are a sin, as they alter god's creation and inflict unnecessary pain. However, nothing is mentioned explicitly in the Quran, so again, it comes down to personal interpretations and preferences. Buddhism and Hinduism allow tattoos, and they play an important role in both religions.