Keloids are raised, thickened areas of scar tissue that develop at the site of skin injury, such as cuts, burns, piercings, or surgery. To prevent keloid formation after ear piercings (keloid on ear), it’s important to take proactive steps, especially for individuals with a known tendency to develop keloid on ear. Opting for a smaller gauge piercing can reduce trauma to the skin. Post-piercing care is crucial: keeping the area clean with saline solution and avoiding infection will help minimize inflammation. 

It's essential to avoid unnecessary irritation by not frequently touching or rotating the jewelry. Using silicone gel sheets or pressure earrings, specifically designed for post-piercing care, can help by reducing tension on the healing skin and preventing excess collagen buildup. In some cases, corticosteroid injections may be recommended shortly after the piercing to suppress the body’s inflammatory response that could trigger keloid on ear formation. 

Those with a history of keloids should consult a dermatologist prior to getting any piercings. Early intervention and consistent care are key to preventing the development of keloid scars.