If you have recently gotten your belly button pierced and suspect an infection, it is important to keep the area clean and dry. You can use a sterile saline solution to clean the area and make sure to dry it thoroughly after showering or bathing. If you notice redness, you can outline it with a pen to monitor any changes. If the redness increases, there is more pus, you experience pain, fever, or any other symptoms, it is best to consult a doctor. They may prescribe topical or oral antibiotics depending on the severity of the infection. In the meantime, you can try to alleviate mild pain with over-the-counter pain relievers like Tylenol or Advil, as long as you are not taking other medications and do not have any allergies. If you have any further concerns, feel free to contact a healthcare professional for advice.