hi, my husband has had a severe ear infection, coughing, a lot of mucous from coughing and congestion and a sore (ulcer) on one of his tonsils, we went to the doctor and got blood work and it all came back normal and he was put on amoxicillin. now he is burping after he eats and he is worried that he has some type of cancer can you please explain that it is not like that for cancer.
Hi and welcome to Chat Doctor. Cancer is always possible especially if he smokes and Chat Doctor.  It can be chronic sinusitis or pharyngitis, bronchitis or esophageal disorder. This ulcer should be verified by ENT if it persists and progress, but cancer is uncommon. If symptoms improve after mobile then it seems to be bacterial infection. Wish you good health.