A Rash

1. (dermatology, medicine) An area of inflamed and irritated skin characterized by reddened spots that may be filled with fluid or pus; also, preceded by a descriptive word (rare or obsolete), an illness characterized by a type of rash.
2. (figuratively)
   1. An irregular distribution or sprinkling of objects resembling a rash (sense 1).
   2. An outbreak or surge in problems; a spate, string, or trend. Synonym: epidemic