<s>[INST] Hi I have a question about mouth sores. I went to my family doctor on friday but he didnt look at my sores at all because I had a fever and my tonsils were all swollen and with white spots on them. It was determined that it wasnt strep but he had me go across the hall for lab work for mono and something else I dont remember. Well he ended up sending me home with tylenol 3 and some time off work because of the fever. Well the sores in my mouth have gotten worse I think. I now have about 4-5 sores on my tongue they are mainly red and one is smaller than my pinky fingernail but whitish in color. Then I also have the roof of my mouth and my gums being very sore and tender to even eat or brush my teeth. I have just started yesterday rinising my mouth with peroxyl and that usually foams up my mouth within seconds. My roomate says my breath smells like it is nothing but infection. Any suggestions on what I should do? [/INST] Thanks for using Chat Doctor. Read your query. Mouth ulcers or sores described here (referred as canker sores) can be due to some factors it can be due to Stress or anxiety related, Nutritional deficiency, vitamin deficiency, immune dysregulation. I would advise you to apply a McCoppin/denote gel two or three times a day. Do salt water gargling for a while.Also, Betadine mouth wash can be of help to you. Avoid spicy food for a while. It will subside on it own gradually within a week or two. Visit an ENT surgeon and have your tonsil infection checked up. Avoid stress and have a nutritious diet. Multi-vitamin supplement can be taken. If still persistent, consult an oral surgeon. Hope this was useful. Thanks and regards. </s>