Is hand foot and mouth disease dangerous?

Hand Foot and mouth. HFMD is a viral infection which causes sores in the mouth, hands and feet along with genitals and buttocks on some occasions. Typically the soles and the palms are involved with red spots,bumps or blisters. Primarily seen in kids but adults can develop it occasionally. Lasts for 2-1 days and treatment is symptomatic. It spreads from mucus of nose, saliva ,fluid from Sores. Spread in 1st week .
Rarely yes. In most cases Hand foot and mouth disease is a very infectious disease but settles without any complications but rarely it can cause complications like infection of heart muscle, gut infection, infection in brain or spinal cord and lungs . http://www.dermnetnz.org/topics/hand-foot-and-mouth-disease/
Can be. It's very contagious. The danger comes of dehydration sets in and becomes profound.