<s>[INST] My 20 month old is grinding his teeth with a fever. Fever started 5 hrs ago at which time we gave him Motrin. Fever is back to 102 he is grinding his teeth. His day care has hand and mouth disease going around. He also got his 18 month shot yesterday. I do not like the teeth grinding... [/INST] Thank for asking I gone through your question, understand your concernAs there is history of 18 month vaccine yesterday, More chance that she is having fever due to that vaccine. The teeth grinding is common is fever.  so give the Motrin thrice a day and if not controlled i suggest to add paracetamol 15 mg per kg per dose , can be given up to 4 times a day  hope answer your query </s>