Bites on a screened porch
The most characteristic sign there is, because the screen that stops mosquitoes does nothing here. Bites while sitting inside intact screening points at midges rather than anything else.
You feel it before you see it
Biting Midges and No-See-Ums on the Grand Strand in Conway, SC
Warm months, in waves after rain, with dawn and dusk the worst hours
Before you call
You will be bitten before anything is visible, which is where the name comes from. Biting midges are tiny coastal flies that breed in damp sand and marsh mud rather than in standing water, and they are small enough to pass straight through ordinary insect screen. That single fact reshapes the whole approach: this is a screening and timing problem more than a spraying one.
First clues
What you are likely seeing
Most people call after noticing one of these.
A tight band of ankle welts
They tend to feed low and where skin is exposed at a sock line or a cuff, so bites cluster rather than scatter the way mosquito bites do.
Unbearable at dusk, gone by nine
Activity is concentrated around dawn and dusk and drops off sharply. A very predictable window like that is the most useful piece of information for planning an evening outdoors.
Calm evenings are the worst ones
They are weak fliers, so a light breeze grounds them and a still, humid evening after rain brings them out in force. A porch fan changes the experience more than most products do.
Why this keeps happening in Conway homes
Geography does this to us. Salt marsh, tidal creeks and brackish edges run all through the eastern side of Horry County and up into the Waccamaw system, and the damp mud and sand along those edges is where these midges develop. Properties toward Murrells Inlet, Garden City, Little River and the creek side streets get the heaviest pressure, but a still evening will carry them well inland, and low lying ground with wet soil produces them locally too rather than everything arriving from the marsh.
Seasonally they follow warmth and rain. Emergence comes in waves after wet weather and warm spells, so an area can be almost unbothered for two weeks and then unusable at dusk for several evenings in a row. Because the developing stages sit in tidal mud and saturated soil, none of it is treatable in any practical or lawful sense, and that is the difference between this insect and a mosquito breeding in your own flower pot.
Conway sits low along the Waccamaw, and the same tidal geography stretches out toward Little River, where the waterfront and its salt marsh push midges inland on the evening breeze. West on US-501 toward Aynor, and north on US-701 near Loris, the ditches and farm ponds breed their own biting swarms. Screened porches and citronella help more than any spray the licensed pros we connect you with can offer here.
Humidity off the Waccamaw keeps midge counts high well past dusk in Conway, but the pattern isn't unique to the riverbank — Litchfield Beach and the golf communities near Litchfield-by-the-Sea deal with the same low, wind-sheltered evenings, and so does Briarcliffe Acres, where the maritime forest lots trap air against the marsh. The licensed pros we connect you with hear the same complaint from every one of these spots: fine mesh screens work, most bug sprays don't.
The same job gets done in Red Hill, Homewood and Finklea, and everywhere else we cover around Conway.
How to identify it
- Size
- Extremely small, with many species around a millimeter, a fraction of a mosquito
- Screens
- Small enough to pass through standard window and porch screen mesh
- Bite
- A sharp sting from mouthparts that cut the skin, leaving a small red welt that itches for days
- Breeding
- Damp sand, mud at the edge of tidal creeks and marsh, wet soil around brackish water
- Worst hours
- Around dawn and again around dusk, especially on still, humid, windless evenings
- Time of year
- Warm months, in waves after rain, with dawn and dusk the worst hours
- Estimated cost
- an estimated $89–$189
Commonly confused with
Mosquitoes and fungus gnats. The tell is whether you ever saw the insect. A mosquito is visible, audible and leaves a raised itchy lump; a biting midge is usually felt first and found afterwards, often as a speck on the skin. Fungus gnats are the other mix-up and they do not bite at all: they come out of the soil of overwatered house plants and drift around a window in slow, aimless loops. If you have welts on your ankles at dusk on a porch and cannot see what is doing it, biting midges are the likely answer.
The treatment, step by step
Honesty first: nobody treats a salt marsh, so this is managed rather than solved. The useful work is mechanical and it starts with screening. Standard mesh does not exclude them, so a porch that is genuinely usable at dusk needs a much finer no-see-um mesh, sometimes called twenty by twenty or finer, on the screened areas people actually sit in. Door sweeps and window screens matter too, since they will bite indoors. Fans are the second mechanical tool and they work well, because a midge cannot hold position in moving air.
Where treatment does contribute, it is to resting sites rather than breeding sites. A residual application to dense shaded shrubs, ground cover and vegetation around a patio reduces the adults sitting in the immediate area, and it is worth timing to the hours and the season when they are active rather than applied on a calendar. Repellents work: an EPA registered product applied to exposed skin is the most reliable protection anyone has on a creek side dock at dusk. What no plan can offer is a treated zone that holds back a marsh, and a company promising that is not being straight with you.
Whether no-see-ums wants ongoing cover comes down to the cause. Fix a route in and it is a job. Leave a damp crawl space and it is a season.
| How it presents | What that usually needs |
|---|---|
| A single event with an obvious source | One call, done |
| Back at the same point every warm spell | A scheduled plan |
| A route in that has clearly been used before | Treat, then seal the route |
What you can do yourself
Most of what works is available to any homeowner. Re-screen the porch in fine no-see-um mesh rather than standard insect screen, fit or replace door sweeps, and repair torn window screens. Put a ceiling fan or a box fan on the porch and use it. Then plan around the hours: move the evening meal outside earlier or later than dusk, and expect the calm humid evenings after rain to be the bad ones. Use an EPA registered repellent on exposed skin and cover ankles. Reduce permanently soggy ground on your own lot where you can, but do not spend money on treating a marsh edge or on trying to spray your way out of dusk, because neither works.
Health and safety, in plain terms
The main issue is the bite itself rather than disease transmission to people. Bites are disproportionately irritating for their size and can raise welts that itch for several days, and some people react more strongly with local swelling, particularly after a run of bites in one evening. Ordinary care applies: leave them alone, use a cold compress and an anti-itch preparation, and keep them clean, since the real complication is a scratched bite becoming infected. Anyone with a spreading reaction, signs of infection or a history of significant allergic responses to insect bites should see a doctor rather than wait it out.
What you would be spending
No-See-Ums normally comes in somewhere from an estimated $89 to $189, with access under the floor moving it as much as anything. Having somebody look costs nothing, and you see the number in writing first. See the pricing guide for the complete set of ranges, and this one is handled under Mosquito & Tick Control.
Further reading
Usually found in the same places
Chiggers
The itch that arrives late. Nobody feels a chigger.
House Mice
No arrival month here. House mice generate more calls than any other rodent, and the fix is not a larger trap.
Yellowjackets
Worst when the season is ending. Trouble with yellowjackets rarely starts in spring.
Questions & Answers
Frequently Asked Questions
Why do I get bitten on a screened porch?
Because ordinary insect screen does not stop them. Standard mesh is designed to exclude mosquitoes and flies, and biting midges are small enough to pass through it, so an intact screen offers almost no protection. Re-screening the areas you actually use with a fine no-see-um mesh is the single most effective thing anyone does about this insect, and a fan on the porch is a close second.
Can you spray the marsh behind my house?
No. It is not practical, it is not lawful for a private company to treat protected wetland, and it would not last if it were. That is why an honest plan focuses on what can be changed: fine mesh screening, fans, timing your evenings around dawn and dusk, repellent on exposed skin, and a residual treatment on the vegetation immediately around a patio where adults rest.
Do citronella candles or bracelets help?
Not meaningfully. A candle affects the air within inches of itself, and repellent bracelets do not protect skin away from the band. What works is an EPA registered repellent applied to exposed skin, covering up at dusk, moving air with a fan, and finer screening. Save the money for the mesh, which keeps working every evening for years.
Get Started Today
Let us get this one closed out
One free inspection settles what it is and how far it has traveled. The estimate lands in writing before a technician starts.
Call (843) 896-1048