The main reason that tea tree oil is not good for piercings is because it can be too drying and harsh on new piercings. You need to dilute the oil with a carrier oil before applying it, or it will cause redness, irritation and other issues.
It can also be too harsh on keloid scars and raised areas of scar tissue known as keloids that may appear from piercings. If you have a piercing with a keloid or scar it is better to use an alternative like coconut oil, which is good for healing piercings and doesn't dry out the skin.
Alternatively you can apply a small amount of diluted tea tree oil to the affected area and massage it in. This will help disinfect the piercing and prevent infections from forming.
In addition, it can also help reduce the risk of infection, particularly from bacteria and fungi that can grow on a piercing site. This is because of the antimicrobial, antiseptic, and anti-inflammatory properties that tea tree oil has.
What is more, this essential oil has a strong anti-fungal and antiviral compound called terpinen-4-ol which is responsible for its effectiveness as an antibiotic and antiseptic agent that can kill bacteria and fungi. This helps to stop the formation of keloids and other scar tissue.
Using tea tree oil as an aftercare for piercings can be helpful, but it should not be used to heal the piercing itself or the wound itself, and should be used only by a professional piercer. In addition to preventing infections, tea tree oil can also help with the healing of wounds and piercings that have already been healed.