Skin lesion due to insect bite

Very low urgency
Very common-

It is an inflammatory skin disorder due to local inflammatory reaction to irritants or pathogens that enter the body through an insect bite.

The most frequent symptoms are localized pain, reddening of the skin, swelling and local heat.

Diagnosis is clinical by questioning and physical examination of the affected area. In some cases, a blood or pus sample may be cultured to study the causative germ.

Treatment aims to reduce inflammation and treat infection if present. It includes local cold, anti-inflammatory drugs, corticosteroid cream and antibiotics if infection is present. 

Bibliographic references
  • Infecciones bacterianas de la piel: Celulitis. A. Damian Dhar. 11-2013.
  • Salgado Ordóñez F, Arroyo Nieto A, Lozano Serrano AB, Hidalgo Conde A, Verdugo Carballeda J; Sociedad Andaluza de Enfermedades Infecciosas (SAEI). Skin and soft tissue infections. Med Clin (Barc). 2009 Oct 17;133(14):552-64.
  • Bermejo A, Clara L, D´Atri GM, Desse J, de Vedia L, Garelli G, et al. Consenso SADI-SAM-SADCACCVE. Guía para el manejo racional de las infecciones de piel y partes blandas – Parte I. Rev Panam Infectol 2009;11(3):49-65.
  • Stevens DL, Bisno AL, Chambers HF, Dellinger EP, Goldstein EJ, Gorbach SL, et al. Practice guidelines for the diagnosis and management of skin and soft tissue infections: 2014 update by the infectious diseases society of America. Clin Infect Dis. 2014 Jul 15; 59(2):147-59.
  • Hakkarainen TW, Kopari NM, Pham TN, Evans HL. Necrotizing soft tissue infections: Review and current concepts in treatment, systems of care, and outcomes. Curr Probl Surg. 2014; 51(8): 344–62.
  • Chira S, Miller LG. Staphylococcus aureus is the most common identified cause of cellulitis:a systematic review. Epidemiol Infect. 2010;138(3):
  • 313-317.
  • Gunderson CG, Martinello RA. A systematic review of bacteremias in cellulitis and erysipelas. J Infect. 2012;64(2):148-155. 
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Symptoms

    Skin changes in the bitten area


    Reddened, tense and shiny skin


    Reddened skin


    Swelling


    Fever / Feel very hot

Symptoms to watch out for

High fever (102.2 ºF or more)
Reduction in the level of consciousness
Persistence of symptoms for more than two weeks after initial treatment

Self-care

Take over-the-counter pain relievers or anti-inflammatories.
Apply local cold to the injured area 3 times a day to reduce inflammation.
Do not take antibiotics without a doctor's prescription.