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Diagnostic Tests for Red spots

Diagnostic Test list for Red spots:

The list of diagnostic tests mentioned in various sources as used in the diagnosis of Red spots includes:

  • Physical examination
    • Temperature
    • Note the characteristics of the red spots and surrounding skin - e.g. macular, papular, pustular, vesicular, bullous, scaly, ulcers - will help determine the cause of the red spots.
    • What areas of the body does it primarily involve - e.g. Extremities, face, trunk? - will help determine the cause.
    • Determine if the red spots arise from a hair follicle (which suggests folliculitis) or arises independently
    • Look for any features that may suggest meningococcal disease. One of the main tests of the meningococcal rash is that it does not fade under pressure. In other words, the skin does not turn whiter or go paler under pressure. Unfortunately, this is not always true in the early stages of the rash, so the rash needs to be assessed regularly to avoid a misdiagnosis in the early stages. The pressure test involves pressing on the rash to see whether it fades. One convenient way is to press on the rash with a clear see-throughdrinking glass, to see through the glass how the rash responds
    • Examine for signs of meningitis such as neck stiffness, altered consciousness and agitation
  • Blood tests
    • Full blood count
    • Platelet count - if reduced, represents thrombocytopenia which results in petechiae (small red, pin-head sized bruises).
    • Blood cultures, if unwell and fever
    • Radioallergosorbent testing (RAST) - to test for specific allergens that may be triggering red spotty rash ( 90% relevant if negative, but only 20% relevant if positive).
    • Viral serology tests, if indicated
  • Skin tests
    • Microscopic examination of scrapings of any skin burrows (to detect scabies mite) or skin rash (to rule out fungal infection)
    • Patch testing to detect skin allergies
    • Skin biopsy may be necessary
  • Swab of any discharge - for bacteria or fungi.
  • Viral culture, if suspect viral infection such as herpes simplex, herpes zoster (shingles), varicella zoster (chicken pox)
  • Lumbar puncture - for microscopy and culture, if suspect meningococcal meningitis.
  • Bone marrow aspiration - may be necessary to help diagnose the cause of thrombocytopenia.

Conditions listing medical symptoms: Red spots:

The following list of conditions have 'Red spots' or similar listed as a symptom in our database. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.

Select from the following alphabetical view of conditions which include a symptom of Red spots or choose View All.

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