UrgentEmergency Guide
Petechiae: Red Flags & Emergency Signs
Petechiae (pinpoint non-blanching spots) with fever constitute a medical emergency — meningococcal septicaemia is the most time-critical diagnosis.
🚨 Call 999 / 112 Immediately
- ⚠Petechiae with fever and deterioration — meningococcal septicaemia (IM/IV benzylpenicillin and 999 now)
- ⚠Petechiae spreading rapidly to become purpura — fulminant meningococcal disease
- ⚠Petechiae with high fever after returning from a tropical region — viral haemorrhagic fever (isolate, public health notification)
⚡ See a Doctor Today
- •Petechiae without fever but with low platelet count — thrombocytopenic purpura (ITP, TTP, leukaemia)
- •Petechiae after valsalva manoeuvre (coughing, vomiting) on face only — usually benign mechanical cause
High-Risk Combinations
When petechiae occurs together with any of these symptoms, urgency increases significantly:
Conditions to Rule Out Urgently
Meningococcal Septicaemiaemergency
IM benzylpenicillin 1.2g; 999; ICU; contact prophylaxis
Immune Thrombocytopenic Purpura (ITP)urgent
FBC + blood film; platelet count; haematology review
Leukaemiaurgent
FBC + blood film; bone marrow biopsy
Condition Authority Pages
Differential diagnosis analyses:
When to Call Emergency Services
- →Non-blanching spots with fever — glass test: if rash visible through pressed glass = 999