Yes, you can use a numbing cream for a touch-up tattoo session. However, it is important to follow the instructions for use provided by the manufacturer to ensure the best results. Additionally, it is a good idea to discuss your plans to use a numbing cream with your tattoo artist, as some artists may prefer not to use the product. If you have used a tattoo numbing cream for a previous tattoo session, it is a good idea to wait until the skin has fully healed before using the cream again. This will help to minimize the risk of skin irritation and other side effects.