Midges, also known as biting midges, sandflies, or “no-see-ums,” are tiny flying insects common in many parts of Australia. Their bites can cause intense itching, swelling, and irritation, especially in warm, humid areas. This guide explains what midges are, how to recognise and treat their bites, when to seek medical care, and practical ways to prevent them during outdoor activities.
What Are Midges? (Biting Midges / Sandflies)
Midges are small, blood-feeding insects that belong to the Ceratopogonidae family. Despite their size, their bite can trigger strong skin reactions. They differ from mosquitoes; midges are smaller, quieter, and often go unnoticed until after the bite has occurred.
Where They’re Found in Australia
Midges thrive in coastal and tropical regions, especially:
- Queensland: Particularly in mangroves and estuarine flats
- Northern NSW & NT: Wetlands and tidal zones
- WA & Coastal Regions: Near mudflats, rivers and saltmarshes
They breed in areas near damp, muddy environments where organic matter is abundant.
When They’re Most Active
Midges are most active during:
- Dawn and dusk — peak biting times
- Warm, humid weather — especially in summer and wet seasons
- Low wind conditions — as they struggle to fly in strong winds
First Aid for Midge Bites (Quick Steps)
Midge bites can cause intense itching and irritation, but quick treatment can prevent further discomfort and infection. The steps below focus on fast relief, skin protection, and when it’s time to seek medical care.
Recognising a Midge Bite
Midge bites may appear minutes to hours after exposure. Common signs include:
- Small red dots or raised welts
- Intense itching or burning sensation
- Local swelling, sometimes in clusters
- Delayed reaction, itching may worsen the next day
Unlike mosquito bites, midge bites may look like tiny pinpricks or rash-like patches.
Step-by-Step: Treating Itch & Swelling
| Step | What to Do |
| 1. Clean | Wash the area gently with mild soap and water. |
| 2. Cool | Apply a cold compress or ice pack for 10–15 minutes. |
| 3. Soothe | Use calamine lotion or hydrocortisone cream to reduce itching. |
| 4. Relieve | Take an oral antihistamine if needed (follow packaging directions). |
| 5. Protect | Avoid scratching; keep nails short to prevent skin damage. |
| 6. Monitor | Watch for signs of infection (redness, pus, heat). |
When to Seek Medical Help
Seek professional care if you notice:
- Severe swelling (face, lips, eyes, or widespread reaction)
- Signs of infection (pain, yellow fluid, fever)
- Allergic symptoms such as hives, dizziness, or difficulty breathing may indicate anaphylaxis
Prompt treatment is important to prevent further complications.
Prevention: How to Avoid Midge Bites
Midges are difficult to see and even harder to avoid once they start biting, which makes prevention essential. Simple changes in clothing, repellent use, and timing can greatly reduce your chances of being bitten, especially in coastal or humid environments.
Clothing & Barriers
- Wear long sleeves, long pants, and socks in known midge areas.
- Choose lightweight, tight-weave fabrics so that midges cannot penetrate loose or open-weave clothing.
- For high-risk zones (mangroves, wetlands), use fine-mesh head nets or face veils.
Repellents & Treatments
- Apply insect repellent containing DEET or picaridin, proven most effective against biting midges.
- Reapply as directed, especially after sweating or swimming.
- Avoid strong perfumes or scented lotions that may attract insects.
Environment Tips
- Avoid dawn and dusk, when midges are most active.
- Use fans or breeze when outdoors – midges struggle to fly in wind.
- Install fine insect screens for windows, patios, and outdoor seating areas.
- In coastal stays or camping, choose accommodation away from still water, mudflats, or mangroves.
Risks & Complications
Midge bites are usually harmless but can lead to stronger reactions in some people, especially if scratched or left untreated. Understanding possible complications helps in recognising when a simple bite needs closer attention.
Allergic Reactions & Infection Signs
- Local allergic response: Large, hot, swollen welts that last several days.
- Secondary infection: Redness, warmth, pus, or increased pain due to scratching.
- Severe allergy (rare): Hives, facial swelling, or breathing difficulty medical emergency.
Children, Older Adults & Sensitive Skin
- Children: More likely to scratch, increasing infection risk.
- Older adults: Slower skin healing and higher risk of prolonged swelling.
- Sensitive skin conditions (e.g., eczema): Bites may trigger flare-ups or intense itching.
Midges vs Mosquitoes (Quick Comparison Table)
| Feature | Midges (Biting Midges / Sandflies) | Mosquitoes |
| Size | Very small (1–3 mm), often invisible (“no-see-ums”) | Larger (3–6 mm), visible |
| Bite Sensation | Often unnoticed until itching begins | Bite is usually felt immediately |
| Biting Time | Dawn and dusk; humid, still air | Evening and night; stagnant water areas |
| Reaction | Intense itching, clusters, or rash-like bites | Raised bump, mild to moderate itch |
| Disease Risk | Rarely associated with disease in Australia | Some species can transmit disease |
| Detection | Hard to see; silent in flight | Audible buzzing and easier to spot |
FAQs
Do midges bite or sting?
Midges bite by piercing the skin with tiny mouthparts, not by stinging. Their saliva causes the intense itching.
How long do midge bites last?
Most bites settle within 2–3 days, but itching may last up to a week in sensitive individuals.
What’s the best repellent for midges in Australia?
Repellents containing DEET or picaridin are the most effective. Reapply as directed, especially outdoors in humid areas.
Are midge bites dangerous?
They are usually harmless but can cause severe itching or infection if scratched. Serious allergic reactions are rare.
How do I stop the itching fast?
Apply a cold compress, then use calamine, hydrocortisone, or an antihistamine to reduce itch and swelling.
Can I be allergic to midge bites?
Yes, some people may experience stronger swelling, hives, or redness. Seek medical advice if symptoms worsen.
Quick Download: Midge First Aid Checklist (PDF)
Keep a simple checklist on hand for camping, fishing, or coastal trips. A midge bite kit should include cleansing wipes, cold packs, soothing cream, and antihistamines to manage itching and swelling quickly.
Checklist Includes:
- Clean & Cool – Soap wipes, cold pack
- Relief – Calamine or hydrocortisone cream
- Allergy Care – Antihistamines (as directed)
- Protection – Bandages or gauze to prevent scratching
Learn First Aid
Being prepared goes beyond relief creams and repellents. Our basic first aid courses help you recognise allergic reactions, manage severe swelling, and act quickly in outdoor emergencies. Consider enrolling in a certified first aid course or keeping a stocked first aid kit to handle bites, stings, and other common injuries with confidence.