Hand, foot, and mouth disease (HFMD) is caused by enteroviruses, most commonly Coxsackievirus and Enterovirus 71. The disease spreads primarily through the digestive tract but can also be transmitted via respiratory secretions. Clinically, HFMD progresses through four distinct stages.

Why people experience sudden jerks while sleeping is a frequently asked question because this phenomenon is very common across all age groups. These sleep starts have specific causes and can be prevented by certain methods.