A tooth abscess is a severe infection that can cause pain and discomfort. Usually, within 2-3 days, you’ll start feeling better and see an improvement in the infection. On average, a full course of antibiotics takes 7 to 14 days to complete, depending on the type used. Nevertheless, it’s important to note that the infection can return if the antibiotics are not taken as prescribed. That’s why it’s vital to finish the full course of antibiotics, even if you feel fine. If the infection returns, you may need further treatment from a dentist. So, if you have a tooth abscess, see a doctor and follow their instructions for recovery.