Doctors Note Logo

Published on: 11/28/2025

How can you tell if your tonsillitis is viral or bacterial, and does that change how contagious it is?

Determining whether tonsillitis is viral or bacterial can be tricky, and it impacts how contagious it is. Bacterial tonsillitis may require antibiotics, while viral cases do not.

answer background

Explanation

Tonsillitis can be caused by either viruses or bacteria, and knowing which one you have is important because it affects treatment and how contagious it is.

  • Bacterial Tonsillitis: This is often caused by a type of bacteria called Streptococcus. It can be more contagious and may require antibiotics, like cefprozil, to treat.

  • Viral Tonsillitis: This type is usually caused by viruses like the common cold. It is also contagious but doesn't need antibiotics.

To figure out which type you have, doctors usually look at symptoms and may do a test. If you have bacterial tonsillitis, you might have a sore throat and fever and need medicine to help you get better. If it's viral, you might just need rest and fluids.

Remember, if you think you or someone else might have tonsillitis, it's important to see a doctor for the right diagnosis and treatment.

Tell your friends about us.

We would love to help them too.

smily Shiba-inu looking

For First Time Users

What is Ubie’s Doctor’s Note?

We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.

Learn more about diseases

Acute Tonsillitis / Pharyngitis

Was this page helpful?

Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.