=Symptoms.=--The onset is usually sudden. It begins with vomiting (in very young children sometimes convulsions), sore throat, fever, chilliness, and headache. The tongue is furred. The patient is often stupid; or may be restless and delirious. Within twenty-four hours or so the rash appears--first on the neck, chest, or lower part of back--and rapidly spreads over the trunk, and by the end of forty-eight hours covers the legs and entire body excepting the face, which may be simply flushed. The rash appears as fine, scarlet pin points scattered over a background of flushed skin. At its fullest development, at the end of the second or third day, the whole body may present the color of a boiled lobster. After this time the rash generally fades away and disappears within five to seven days. It is likely to vary much in intensity while it lasts. As the rash fades, scaling of the skin begins in large flakes and continues from ten days to as many weeks, usually terminating by the end of the sixth to eighth week. One of the notable features is the appearance of the tongue, at first showing red points through a white coating, and after this has cleared away, in presenting a raspberry-like aspect. The throat is generally deep red, and the tonsils may be dotted over with white spots (see Tonsilitis) or covered with a whitish or gray membrane suggesting diphtheria, which occasionally complicates scarlet fever. The fever usually is high (103 deg. to 107 deg. F), and the pulse ranges from 120 to 150; both declining after the rash is fully developed, generally by the fourth day. The urine is scanty and dark. There is, however, great variation in the symptoms as to their presence or absence, intensity, and time of occurrence and disappearance.