Tonsillitis
Tonsillitis is an infection and inflammation of the tonsils. The two tiny lumps of the soft tissue at the back of the throat, one on either side, are known as tonsils. When you open your mouth and stick out your tongue, you can clearly see the tonsils in a mirror.
Tonsils are an essential part of the immune system as they trap some of the germs that can make you ill. If these tonsils get infected, they swell and become painful, making swallowing difficult. Tonsillitis infection is also known as tonsillopharyngitis, but its most often referred to as a sore throat. It is more common among children, but it may affect people of all ages. The underlying infection's cause determines treatment.