Hi,
Scarlet fever causes a characteristic bright red rash that begins under the arms and on the neck, chest, armpit, inner thighs and groin area as small red
spots that gradually become elevated and spread over the body. Within a few days, the redness fades and a finely textured rash, sometimes referred to as a sandpaper rash, develops. The rash is caused by toxins produced by the streptococcal bacteria.