Hand, foot, and mouth disease (HFMD) is a highly contagious disease caused by several enteroviruses. These viruses are transmitted via nasal secretions, kissing, and saliva. HFMD causes the following symptoms and signs: decreased appetite, sore throat, fever, weakness, and painful sores on the hands, feet, and in the mouth.
https://www.medicinenet.com/hand-foot-and-mouth_syndrome/article.htm