The process of breaking out, as of a skin rash or a new tooth.
Eruption, or rash, means an outbreak, in a scattered form, upon the surface of the skin. The skin is usually raised and red, or it may be covered with scales, or crusts, or vesicles containing ?uid. Eruptions di?er in appearance: for example, the eruption of MEASLES is always distinguishable from that of CHICKENPOX. But the same disease may also produce di?erent eruptions in di?erent people; or in the same person in di?erent states of health; or even on di?erent parts of the body at one time.
Eruptions may be acute or chronic. Most of the acute eruptions belong to the exanthemata (see EXANTHEM): that is, they are bright in col-our and burst out suddenly like a ?ower. These are the eruptions of SCARLET FEVER, measles, German measles (see RUBELLA), SMALLPOX and chickenpox. In general, the severity of these diseases can be measured by the amount of eruption. Some eruptions are very transitory, like nettle-rash, appearing and vanishing again in the course of a few hours. (See also SKIN, DISEASES OF.)
n. 1. the outbreak of a rash. A bullous eruption is an outbreak of blisters. 2. (in dentistry) the emergence of a growing tooth from the gum into the mouth.
(PEP) intensely itchy papules and weals on the abdomen (except the umbilicus), upper limbs, and buttocks, usually within the *striae gravidarum; it is also known as PUPPP (pruritic urticarial papules and plaques of pregnancy). It occurs in 1 in 250 first pregnancies late in the third trimester. This condition is harmless to mother and baby, but can be very annoying. It lasts an average of 6 weeks and resolves spontaneously 1–2 weeks after delivery. The most severe itching normally lasts for no more than a week.... polymorphic eruption of pregnancy
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