About this article
Medically reviewed- Written by
- Dr Paul Watson
- Medically reviewed by
- Dr Han Simpson
- Published
- April 27, 2026
- Medical review date
- September 8, 2026
- Evidence searched through
- September 8, 2026
- Next review due
- September 8, 2027
- Intended audience
- General Readers & Patients
- Geographic scope
- Worldwide
- Conflicts of interest
- None declared.
- Funding
- Website Owner
- Report a correction
- Report an error or editorial concern
- Medical disclaimer
- Read the medical disclaimer
Petechiae are small, pinpoint spots on the skin that often prompt concern—especially when people search for “petechiae pictures” to compare what they’re seeing on their own body. While these tiny red, purple, or brown dots can be harmless in some cases, they can also signal underlying medical conditions that require attention.
This medically accurate, in-depth guide explains what petechiae look like, why they occur, how to distinguish them from other skin conditions, and when to seek medical help. If you’ve been searching for images to understand your symptoms, this article will give you a complete, evidence-based perspective.
What Are Petechiae?
Petechiae are small, flat spots under the skin caused by minor bleeding from tiny blood vessels called capillaries. These spots typically measure less than 2 millimeters in diameter.
Unlike many other skin marks:
- Petechiae do not blanch (turn white) when pressed
- They are usually flat, not raised
- They often appear suddenly
They can occur anywhere on the body but are most commonly found on:
- Arms
- Legs
- Abdomen
- Buttocks
- Inside the mouth (mucosal petechiae)
What Do Petechiae Look Like in Pictures?
When people search for “petechiae pictures,” they are typically trying to identify these distinguishing visual features:
Color
- Red (early stages)
- Purple or dark red (as bleeding settles)
- Brownish (as they begin to fade)
Size and Shape
- Pinpoint dots (like a fine rash)
- Uniform or scattered distribution
- Flat against the skin
Pattern
- Can appear in clusters or spread out
- May resemble a rash but without texture
Key Visual Identifier: The Glass Test
A simple way doctors differentiate petechiae from other rashes is the glass test:
- Press a clear glass against the skin
- Petechiae remain visible (do not fade)
- Other rashes often blanch under pressure
This is a critical distinction when comparing petechiae pictures online.
Petechiae vs Other Skin Conditions
Many people mistake petechiae for other types of skin markings. Understanding the differences is essential.
Purpura
- Larger than petechiae (2–10 mm)
- Similar cause (bleeding under skin)
- Often deeper in color
Ecchymosis (Bruises)
- Much larger areas
- Often caused by trauma
- Color changes over time
Rashes
- Often raised or itchy
- May blanch under pressure
- Usually caused by inflammation, not bleeding
Heat Rash
- Small red bumps
- Typically itchy or prickly
- Caused by blocked sweat glands
Common Causes of Petechiae
Petechiae can result from a wide range of causes—from harmless to serious.
1. Minor Physical Strain
One of the most common and harmless causes.
- Intense coughing
- Vomiting
- Heavy lifting
- Straining during bowel movements
These actions increase pressure in capillaries, causing them to burst.
2. Trauma or Injury
- Tight clothing or straps
- Prolonged pressure on skin
- Minor impacts
3. Medications
Certain drugs can increase bleeding risk:
- Blood thinners (e.g., warfarin, aspirin)
- Chemotherapy drugs
- Some antibiotics
4. Infections
Some infections can cause petechiae and require urgent care.
Viral infections
- Influenza
- COVID-19
- Epstein-Barr virus
Bacterial infections
- Meningococcal infection (medical emergency)
- Sepsis
5. Platelet Disorders
Platelets help blood clot. When levels drop, petechiae can appear.
- Thrombocytopenia (low platelet count)
- Immune thrombocytopenic purpura (ITP)
- Bone marrow disorders
6. Vitamin Deficiencies
- Vitamin C deficiency (scurvy)
- Vitamin K deficiency
7. Autoimmune Conditions
- Lupus
- Vasculitis
When Petechiae Are a Medical Emergency
While many cases are harmless, some require immediate attention.
Seek urgent care if petechiae are accompanied by:
- Fever
- Stiff neck
- Sensitivity to light
- Confusion
- Rapid spreading of spots
- Severe fatigue
These symptoms could indicate meningitis or sepsis, both life-threatening conditions.
Petechiae in Children vs Adults
In Children
Petechiae can be more concerning, especially with fever.
- Viral infections are common causes
- However, serious bacterial infections must be ruled out
In Adults
More often linked to:
- Medications
- Chronic conditions
- Platelet abnormalities
How Petechiae Are Diagnosed
Looking at petechiae pictures online is not enough for diagnosis. A medical evaluation includes:
Medical History
- Recent illness
- Medication use
- Trauma or strain
Physical Examination
- Distribution and pattern
- Associated symptoms
Blood Tests
- Platelet count
- Clotting function
- Infection markers
Additional Tests (if needed)
- Bone marrow biopsy
- Imaging
- Specialized blood panels
Treatment Options
Treatment depends entirely on the underlying cause.
Mild Cases
If caused by strain or minor injury:
- No treatment required
- Spots typically fade within a few days
Medication-Related
- Adjust or stop the causative drug (under medical supervision)
Infection-Related
- Antibiotics (for bacterial infections)
- Supportive care for viral infections
Platelet Disorders
- Steroids
- Immunotherapy
- Platelet transfusions (in severe cases)
Nutritional Deficiencies
- Vitamin supplementation
- Dietary changes
How Long Do Petechiae Last?
- Mild cases: 2–7 days
- More serious causes: persist or worsen without treatment
Unlike bruises, petechiae may not go through dramatic color changes.
Prevention Strategies
While not all cases are preventable, risk can be reduced:
- Avoid excessive straining
- Use medications responsibly
- Maintain a balanced diet
- Stay up to date with vaccinations
- Seek early treatment for infections
The Limitations of Petechiae Pictures
Searching for “petechiae pictures” can be helpful—but also misleading.
Why images can confuse:
- Lighting affects color perception
- Skin tone variations change appearance
- Similar-looking conditions may not be petechiae
- Severity cannot be judged visually alone
A doctor evaluates the whole clinical picture, not just appearance.
Psychological Impact of Symptom Searching
Looking at medical images online can increase anxiety.
- People often assume the worst-case scenario
- Visual comparisons lack context
- Self-diagnosis can delay proper care
Balanced information and professional advice are key.
Key Takeaways
- Petechiae are small, non-blanching spots caused by bleeding under the skin
- They can be harmless or indicate serious illness
- Visual identification alone is not sufficient for diagnosis
- Associated symptoms determine urgency
- Medical evaluation is essential when in doubt
FAQ
What do petechiae look like in pictures?
Petechiae appear as tiny red, purple, or brown dots under the skin. They are flat, do not blanch when pressed, and often occur in clusters.
How can I tell if spots are petechiae or a rash?
Petechiae do not fade when pressed (glass test), while most rashes do. Petechiae are also flat and caused by bleeding, not inflammation.
Are petechiae always serious?
No. Petechiae can result from harmless causes like coughing or minor strain. However, they can also indicate serious conditions, especially if accompanied by fever or other symptoms.
Where do petechiae usually appear?
They commonly appear on the legs, arms, abdomen, and sometimes inside the mouth.
How long do petechiae last?
Mild cases usually resolve within a few days. Persistent petechiae may require medical evaluation.
Can stress cause petechiae?
Stress alone does not directly cause petechiae, but physical strain related to stress (like vomiting) can.
When should I worry about petechiae?
You should seek medical attention if petechiae are spreading, persistent, or accompanied by fever, fatigue, or other systemic symptoms.
Can petechiae go away on their own?
Yes, if caused by minor factors. However, underlying causes must be ruled out if they persist.
Are petechiae contagious?
Petechiae themselves are not contagious, but underlying infections that cause them may be.
Do petechiae itch or hurt?
Typically, petechiae are not itchy or painful. If symptoms like itching occur, another condition may be present.
Final Thoughts
Petechiae are a small but important clinical sign. While images can help you recognize them, they should never replace a proper medical evaluation. If you’re unsure about what you’re seeing—even after reviewing petechiae pictures—the safest step is to consult a healthcare professional.
Early assessment ensures peace of mind and, when necessary, timely treatment.
See our article on petechiae vs pepura.