Time. Time. It is a viral infection that normally lasts 7-10 days . It does not respond to antibiotics and runs it's cousre. The main complication that may be concering is dehydration because of poor fluid intake 2ndry to the mouth ulcers. Only relif of symptoms thru tylenol, (acetaminophen) gargles etc is helpful.
Hand foot and mouth. Hand, foot and mouth disease (HFMD) is usually a short mild illness that mainly affects children. Most children fully recover within ten days, and usually less. Serious complications occur rarely. This disease is not related to the disease with a similar name which affects animals. http://patient.info/health/hand-foot-and-mouth-disease-leaflet.