Some tonsillitis symptoms, such as a fever and sore throat, are similar to other common illnesses like a cold. Other symptoms, like a stomachache or headache, might not be so obvious. If your child has had a severe sore throat lasting more than a couple of days or any other symptoms of tonsillitis, you should talk to a doctor. They will need to determine not only if the symptoms do indicate tonsillitis, but also if a virus or a bacterial infection is the cause. Nine out of ten cases will be viral, and treatment will be mainly concerned with alleviating symptoms. Bacterial infections may be treated with antibiotics. Though tonsillitis is very common in children and usually clears up quickly, it can be more of an issue for adults. So, if you have symptoms of tonsillitis, see your doctor.