If you suspect that your ear piercing is infected, there are several steps you can take to treat it:

1. Wash your hands with soap and warm water before touching the piercing.
2. Clean the infected ear piercing with a saline solution. You can make your own by mixing 1/2 teaspoon of salt with 1 cup of warm water. Soak a cotton ball or pad in the solution and apply it directly to the piercing site.
3. Apply an over-the-counter antibiotic cream to the piercing site.
4. Avoid removing the piercing, as this can cause the hole to close up and trap the infection inside.
5. Avoid using alcohol, hydrogen peroxide, or other harsh chemicals on the piercing, as these can irritate the skin and delay healing.
6. Avoid wearing tight or heavy earrings that can put pressure on the piercing and slow down the healing process.
7. If the infection does not improve within a few days or if you experience severe symptoms such as fever, chills, or spreading redness, see a doctor for further treatment.

Remember that prevention is key when it comes to ear piercing infections. Choose an experienced piercer who uses clean and sterile equipment, and follow their aftercare instructions carefully. Keep the piercing clean and avoid touching it with dirty hands. With proper care, most ear piercing infections can be avoided or treated quickly and easily.