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miliaria (heat rash, sweat rash)

Etiology: 1) Miliaria crystallina 2) Miliaria rubra 3) Miliaria profunda * based upon the level at which the occlusion occurs Pathology: - occlusion of sweat glands in the dermis & epidermis resulting in milia Clinical manifestations: - milia or small erythematous papules or papule/vesicles - pruritus, burning, prickling - rash may be confined to dependent parts of the body - may be found on back of ventilated ICU patients in a supine position for a prolonged period of time [2] * images [4,5] Laboratory: -> laboratory tests are not useful in diagnosis of miliaria Management: (common to all forms of miliaria) 1) moving to cooler environment 2) application of cool compresses 3) wearing light, loose-fitting clothing 4) avoidance of greasy topical agents 5) natural desquamation 6) ensure adequate hydration 7) talcum or cornstarch may be used to dry the skin [2]

Related

milium

Specific

lupus miliaris disseminatus faciei; facial idiopathic granulomas with regressive evolution (LMDF, FIGURE) miliaria crystallina miliaria profunda miliaria pustolosa miliaria rubra (prickly heat)

General

skin disease (dermatologic disorder, dermatopathy, dermatosis) heat injury; heat stress; heat illness

References

  1. Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 926
  2. Medical Knowledge Self Assessment Program (MKSAP) 16, 18 American College of Physicians, Philadelphia 2012, 2018
  3. Feng E, Janniger CK. Miliaria. Cutis. 1995 Apr;55(4):213-6. PMID: 7796612
  4. DermNet NZ: Miliaria (images) http://dermnetnz.org/hair-nails-sweat/miliaria.html
  5. Levin NA, Elston DM (images) Medscape: Dermatologic Manifestations of Miliaria http://emedicine.medscape.com/article/1070840-overview