Question: "Should Christian men or women wear earrings?"
Answer: There were men and women in the Bible who wore earrings (Exodus 32:2-3; Numbers 31:50; Judges 8:24; Song of Solomon 1:10-11). The Bible nowhere condemns an earring or earrings in women or men. Some people wonder why earrings are for the most part accepted, but other body piercings are considered questionable at best. This is a good point. The whole issue of piercings is not one of "Does the Bible forbid this?" but rather "Is this something I should do?"
While there is no specific counsel in the Bible about earrings, Paul had general things to say about jewelry when he advised Timothy on worship within the local church: "I also want women to dress modestly, with decency and propriety, not with braided hair or gold or pearls or expensive clothes, but with good deeds, appropriate for women who profess to worship God" (1 Timothy 2:9-10). The principle here applies both in and out of church: modesty, decency, propriety, and good deeds are the hallmarks of a true Christian in both men and women.
Whether we choose to wear earrings or any other piece of jewelry is a matter of personal conscience. In any case, clearly our responsibility as Christians is to bring honor and glory to the God we profess to love, doing nothing out of vain conceit (Philippians 2:3), and remembering that "man looks at the outward appearance, but the LORD looks at the heart" (1 Samuel 16:7).