Severe itching can be caused by various factors such as allergies, skin conditions, or liver problems. To relieve the itching, you can try using over-the-counter antihistamines or topical creams recommended by your doctor. Additionally, keeping your skin moisturized and avoiding triggers like hot showers or certain fabrics may help. As for your bilirubin level of 2.3, it is slightly elevated but not considered dangerously high. However, it is important to consult with a healthcare professional to determine the underlying cause and receive appropriate treatment if necessary. They will be able to provide further guidance based on your specific situation and medical history.