A spectrum — but will you recognize the blurry signposts?   Temperature (core) Presentation Management Miliaria Crystallina Normal Salt-colored tiny papules, easily burst; not pruritic Modify environment; light clothing; hydration         Miliaria Rubra Normal Discrimiate, red papules, not assocaited with follicles; pruritic Above plus cool compresses; calamine lotion; symptomatic tx for pruritis          Miliaria Profunda Normal Confluent flesh-colored, “lumpy-bumpy”; burning Same as rubra         Miliaria Pustulosa Normal May resemble rubra and/or crustallina, but pustular; h/o previous dermatitis Same as above, but may may need antibiotic if no improvement over time         Heat edema Normal Swelling of feet, ankles, and/or lower legs Modify environment; elevate legs         Heat syncope Normal Dizziness, orthostatic hypotension, and syncope after exertion with rapid return to normal mental status when supine Modify environment; rehydration; monitoring         Heat cramps May be elevated to 40°C (104°F) Exercise-induced cramping in large muscle groups, especially legs Hydration; consider labs (Cr, total CK); may counsel to stretch muscles passively, gently         Heat tetany May be elevated to 40°C (104°F) Hyperventilation with paresthesia, carpopedal spasm Modify environment; hydration; may place non-rebreather mask on low (or off) for rebreathing CO2         Heat exhaustion Elevated up to 40°C (104°F) Normal mental status, fatigue, that rapidly improves with treatment; tachycardia; GI symptoms; electrolyte abnormalities  Cool environment; hydration; consider labs with severe symptoms, or if not improved          Heat Stroke >40 to 40.5°C   (104 to 105°F) Altered mental status; tachypneic; tachycardic with hypotension; electrolyte abnormalities; GI symptoms; often with renal failure, rhabdomyloysis, renal failure; possibly with cardiogenic shock or ARDS or DIC Rapid cooling with all modalities available (radiation, conduction, convection, evaporation); IV rehydration; labs; monitoring; ICU admission Miliaria Crystallina Miliaria Crystallina — Infant Miliaria Crystallina — Older Child Miliaria Rubra — Infant Miliaria Rubra — Infant Miliaria Rubra — Toddler Miliaria Rubra — Adolescent Miliaria Profunda

Selected References

Bergeron MF, Devore C, et al. Council on Sports Medicine and Fitness and Council on School Health, Policy statement—Climatic heat stress and exercising children and adolescents. Pediatrics 2011; 128:e741.

Casa DJ et al. The Inter-Association Task Force for Preventing Sudden Death in Secondary School Athletics Programs: Best-Practices Recommendations. J Athl Train. 2013 Jul-Aug; 48(4): 546–553.

DeFranco MJ et al. Environmental issues for team physicians. Am J Sports Med. 2008 Nov;36(11):2226-37.

Ishimine P. Hyperthermia. In: Pediatric Emergency Medicine, Baren JM, Rothrock SG, Brennan JA, Brown L (Eds), Saunders Elsevier, Philadelphia 2008. p.992.

Jardine DS. Heat illness and heat stroke. Pediatr Rev 2007; 28:249.