Heat rash (miliaria rubra), also known as prickly heat, is a rash of small red bumps caused by blockage of the sweat glands. It can be due to high fever, excessive ...SKINCONDITIONSHEALTHTOPICSFORPROFESSIONALSSKINCONDITIONSHOMESKINCONDITIONSHEALTHTOPICSFORPROFESSIONALScaptiongoeshere...ImagesofMiliariaRubraCloseVideoOverviewHeatrash(miliariarubra),alsoknownaspricklyheat,isarashofsmallredbumpscausedbyblockageofthesweatglands.Itcanbeduetohighfever,excessivesweating,orbeingover-bundled.Itiscommonlyseeninhot,humidtropicalclimates.Itcancausediscomfort,itching,and,sometimes,stingingor"prickly"-typepain.Who'satrisk?Heatrashismorecommoninhot,humidtropicalclimates.Someonewhoisnewtosuchanenvironmentisespeciallyvulnerable.Heatrashcanbeduetohighfever,excessivesweating,orbeingover-bundled.Itoccursinindividualsofallraces,althoughtoalesserdegreeinAsians.Infantsarethemostcommonlyaffectedastheyaresubjecttoover-bundlingoutofconcernforheatlossafterbirth.SignsandSymptomsHeatrashcanoccurafterexposuretohotconditions.Therecanbemanysmall,redbumpsalloverthebody.Thebumpsofheatrashusuallyoccurinhighestconcentrationincoveredareaswherethereisalotoffriction,suchastheneck,chest,andbodyfolds.Theface,palms,andsolesaregenerallynotaffectedbyheatrash.Therashcancauseintenseitchingandstinging,whichcanbecomeworsenedbyheat.Theindividualmayfeelfatiguedandbecomeintolerantofheatbecauseoflittleornosweatingattheaffectedareas.Self-CareGuidelinesPreventionandtreatmentofheatrashconsistofcontrollingheatandhumidity.Acetaminophenoribuprofencanhelptoreducefever,whichcanbeacausativeagentinthedevelopmentoftherash.Removeanyocclusiveclothing,limitactivity,andseekairconditioningoranycoolerenvironment.Coolcompressescanalsohelpwiththediscomfort.Heatrashusuallyresolvesoncepeoplemovetoacoolerenvironment.Makesuretodrinklotsoffluids.WhentoSeekMedicalCareThemostcommoncomplicationsfromheatrashincludesecondaryinfectionfromscratchingandheatexhaustion.Althoughuncommon,infectedareasduetobreaksintheskincausedbyscratchingmayneedantibio