Tonsillitis is an infection of the tonsils, which are two lymphoid tissue lumps in the back of your throat. Your tonsils function as filters, keeping bacteria that could otherwise make their way into your airways and cause illness. Antibodies are also produced by them to help fight infection. However, bacteria or viruses can sometimes overpower them and recurrent tonsillar infection can lead to swollen and hypertrophied tonsils. Tonsillitis is a frequent ailment, particularly in youngsters. In some patients it might happen on a recurrent basis which will need surgical removal of tonsils.