My daughter pierced her inner ear and a keloid formed and was painful and sore. She tried acv, tea tree oil, calendula cream, lavender, salt water and various other natural remedies all to no avail. She had a roommate who was genetically prone to keloid scarring and she recommended crush uncoated Tylenol with a couple drops of water to make a paste. Leave on for no more than five mins. at a time. Within 3 days and 3 applications later, 95% of the keloid went away. It opened up and stuff came out and than scabbed over.