I have been on antibiotics this is a third day?

Dr. or ER can check: An evaluation is needed. Herpes causes throat and gums sores if a new infection. There are enteroviruses (stomach viruses) that cause hand-foot-mouth disease. Coxsackie virus is a cause of HFM and can infect people of all ages. Patients get mouth sores, from a few to many sores, and have pain with eating and drinking. The virus can cause other symptoms, but first an exam and diagnosis are needed.