Tonsillitis is inflammation of the tonsils in the upper part of the throat. Tonsillitis is a type of pharyngitis that typically comes on fast (rapid onset). Symptoms may include sore throat, fever, enlargement of the tonsils, trouble swallowing, and large lymph nodes around the neck. Complications include peritonsillar abscess.Tonsillitis is most commonly caused by a viral infection and about 5% to 40% of cases are caused by a bacterial infection. When caused by the bacterium group A streptococcus, it is referred to as strep throat. Rarely bacteria such as Neisseria gonorrhoeae, Corynebacterium diphtheriae, or Haemophilus influenzae may be the cause. Typically the infection is spread between people through the air. A scoring system, such as the Centor score, may help separate possible causes. Confirmation may be by a throat swab or rapid strep test.Treatment efforts involve improving symptoms and decreasing complications. Paracetamol (acetaminophen) and ibuprofen may be used to help with pain. If strep throat is present the antibiotic penicillin by mouth is generally recommended. In those who are allergic to penicillin, cephalosporins or macrolides may be used. In children with frequent episodes of tonsillitis, tonsillectomy modestly decreases the risk of future episodes.About 7.5% of people have a sore throat in any three-month period and 2% of people visit a doctor for tonsillitis each year. It is most common in school-aged children and typically occurs in the colder months of autumn and winter. The majority of people recover with or without medication.
In 82% of people, symptoms resolve within one week, regardless if bacteria or viruses were present. Antibiotics probably reduce the number of people experiencing sore throat or headache, but the balance between modest symptom reduction and the potential hazards of antimicrobial resistance must be recognised. Signs and symptoms
Those with tonsillitis usually experience sore throat, painful swallowing, malaise, and fever. Their tonsils – and often the back of the throat – appear red and swollen, and sometimes give off a white discharge. Some also have tender swelling of the cervical lymph nodes.Many viral infections that cause tonsillitis will also cause cough, runny nose, hoarse voice, or blistering in the mouth or throat. Infectious mononucleosis can cause the tonsils to swell with red spots or white discharge that may extend to the tongue. This can be accompanied by fever, sore throat, cervical lymph node swelling, and enlargement of the liver and spleen. Bacterial infections that cause tonsillitis can also cause a distinct "scarletiniform" rash, vomiting, and tonsillar spots or discharge.Tonsilloliths occur in up to 10% of the population frequently due to episodes of tonsillitis. Causes
Viral infections cause 40 to 60% of cases of tonsillitis. Many viruses can cause inflammation of the tonsils (and the rest of throat) including adenovirus, rhinovirus, coronavirus, influenza virus, parainfluenza virus, coxsackievirus, measles virus, Epstein-Barr virus, cytomegalovirus, respiratory syncytial virus, and herpes simplex virus. Tonsillitis can also be part of the initial reaction to HIV infection.